‘Harry Potter’s Biggest Problems That Even HBO Can’t Fix

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While many consider Harry Potter a timeless classic, it’s not without its flaws. Even author J.K. Rowling acknowledges some creative inconsistencies within the series, and these continue to be debated among dedicated fans, especially now with the upcoming HBO television show. The big question is whether the new series will ignore these issues or attempt to address them.

I’ve always been fascinated by the Thestrals, those skeletal horses Harry first sees in Order of the Phoenix. It’s something fans have debated since 2007! I used to wonder, if Harry saw his parents die as a baby, why didn’t he notice them pulling the Hogwarts carriages from day one? Apparently, J.K. Rowling explained that Harry didn’t truly see his parents’ deaths – or if he did, he was just too young to understand what was happening. That’s why he couldn’t see the Thestrals until after witnessing Cedric Diggory’s death at the end of Goblet of Fire. It all makes sense now!

Rowling has addressed one issue, but the remaining problems are much harder to ignore. Even with clever solutions from HBO, these plot holes will likely remain puzzling aspects of the Harry Potter series. Here’s a ranking of those issues, from mildly confusing to those fans have debated for decades.

8
Dumbledore Can’t See What’s Under Quirrell’s Turban

It’s always been strange that Albus Dumbledore, a famously intelligent and perceptive wizard, didn’t seem to realize Voldemort was living on the back of Professor Quirrell’s head. Dumbledore consistently demonstrates a strong awareness of everything happening at Hogwarts, and even manages to detect Harry while he’s invisible. It doesn’t add up that he can sense something as subtle as a Deathly Hallow, yet remains oblivious to his greatest enemy hiding in plain sight, even under a simple turban! Considering Dumbledore’s incredible accomplishments – like defeating Grindelwald, discovering numerous uses for dragon’s blood, and performing magic without speaking – his failure to notice the parasitic Voldemort is incredibly out of character, almost as unbelievable as Draco Malfoy and Hermione Granger becoming friends.

7
Why Does Slytherin House Still Exist?


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In Harry Potter and the Sorcerer’s Stone, Hagrid claims that all evil witches and wizards came from Slytherin House. This raises the question: why hasn’t a headmaster like Dumbledore gotten rid of Slytherin altogether? Or at least given new Slytherin students thorough psychological evaluations? It seems like being placed in Slytherin suggests a potential for dangerous tendencies, so it’s strange that students from that house are still allowed to attend Hogwarts.

Let’s talk about consequences. In Half-Blood Prince, we see Dumbledore pay the ultimate price when Draco Malfoy tries to kill him. And honestly, thinking back, if Dumbledore had shut down Slytherin House years earlier, Draco wouldn’t even be at Hogwarts, let alone put in a position to attempt murder. It’s a crucial point. Plus, the fact that the Slytherin common room is literally in the dungeons? That should tell you everything you need to know about the kind of students that House tends to attract, right? It’s a pretty clear signal about their values, or lack thereof.

6
Voldemort Doesn’t Force Death Eaters To Make Unbreakable Vows


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The Unbreakable Vow is a powerful magical agreement between two people, guaranteeing they’ll both keep their promise. Breaking the vow results in immediate death. It seems like a dark wizard might find this a useful way to ensure loyalty, but Voldemort never asks his followers to make this vow. He uses the Dark Mark instead, branding his followers and summoning them when needed. However, as shown by the Malfoys in Deathly Hallows, Death Eaters are actually free to abandon Voldemort if they want to.

It’s strange that Voldemort doesn’t require his followers to make Unbreakable Vows – magical oaths of absolute loyalty. While making these vows would take time and require a witness, it would eliminate any doubt about his followers’ dedication. Plus, he wouldn’t even have to personally punish anyone who broke their oath! The existence of Unbreakable Vows isn’t revealed until later in the series, suggesting J.K. Rowling may have added them as she wrote. Nevertheless, once established, it seems odd that Voldemort doesn’t utilize them, particularly before the final battle in the seventh book where his fate is sealed.

5
Harry’s Terrible Vision Is Never Exploited in Battle


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It’s strange that Harry Potter’s nearsightedness – his reliance on glasses to see – isn’t used against him more often in the books. Despite his glasses being so noticeable, no villain ever tries to break or remove them during a fight to impair his vision. It’s surprising that characters like Draco Malfoy, or even J.K. Rowling herself, didn’t explore this simple way to disable him. The chance to exploit this weakness was always there, but no one ever does, which is quite baffling.

It’s strange that in a world full of magical solutions – like moving staircases and instant travel – there’s no spell to correct vision problems. They can turn animals into teacups and even curse jobs, but fixing nearsightedness or astigmatism seems impossible? Madam Pomfrey can magically heal broken bones, but Harry never gets anything like laser eye surgery throughout the entire series. It’s not just odd, it makes you question why wizards can’t simply fix eyesight.

4
Veritaserum Is Grossly Underutilized


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Veritaserum is a potent potion that forces anyone who drinks it to tell the complete truth. It’s incredibly powerful – comparable to magical items like Invisibility Cloaks and Elder Wands – but it’s surprisingly underused in the Harry Potter series. Dumbledore famously uses it in Goblet of Fire to get Barty Crouch Jr. to confess his true identity and evil scheme. This raises the question: if Veritaserum could expose such a major villain, why wasn’t it used earlier to solve other mysteries? For example, it could have proven Sirius Black’s innocence before he was sent to Azkaban, or revealed Lucius Malfoy’s allegiance to the Death Eaters long before it was confirmed in Goblet of Fire.

It’s strange that the wizarding world, with its established legal system, doesn’t regularly use Veritaserum – a potion that quickly reveals the truth. This simple substance could have easily confirmed Harry’s warnings about Voldemort’s return and proven his honesty. Like the story of Regulus Black and the Horcruxes, Veritaserum feels like an overlooked and underused element of the Harry Potter series, which weakens its impact.

3
The Potters Chose the Worst Secret-Keeper Ever


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It’s still a mystery why James and Lily Potter chose Peter Pettigrew to be their Secret-Keeper – they could have selected anyone. Pettigrew was meant to protect their location from Voldemort, but he shockingly betrayed them, leading to their deaths with baby Harry present. It’s unclear why they didn’t choose Sirius Black or Remus Lupin, but it’s certain they should have chosen someone other than Pettigrew.

Bill and Fleur Weasley transformed their seaside cottage into a secure hideout for the Order of the Phoenix, shielding it with the powerful Fidelius Charm, similar to how the Potters protected their home. However, unlike the Potters, they wisely chose Bill himself to be the Secret-Keeper. This ensured their family’s safety and provided a haven for Harry, Ron, and Hermione during their travels in Deathly Hallows. Choosing Bill also eliminated the risk of a friend or acquaintance potentially betraying them. It’s baffling that Lily and James Potter didn’t choose each other as Secret-Keepers, considering their magical abilities – they were both Hogwarts Prefects, and James was even Head Boy. Given their talent, and the fact that Voldemort even tried to recruit them, trusting Peter Pettigrew – a man who secretly worked against them – was a disastrously poor decision.

2
The Time-Turner Isn’t Used for Infinitely More Important Things


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The Time-Turner, a device with incredible potential in the Harry Potter series, feels underused. While Hermione uses it in Prisoner of Azkaban to simply take extra classes – a rather dull application for such a powerful tool – she and Harry do manage to save Buckbeak and Sirius Black. However, considering its capabilities, the Time-Turner could have been used to address much larger issues throughout the rest of the books.

Dumbledore had the power to travel back in time and potentially change the course of events, perhaps even helping young Tom Riddle—the future Voldemort—before he became evil. Maybe all Riddle needed was someone to talk to and a little comfort. The Time-Turner could also have saved lives throughout the series, including Sirius Black and all those lost in the Battle of Hogwarts. Although time travel is risky, it seems strange that Dumbledore didn’t use the Time-Turner again after it was introduced, especially considering his goal—and the goal of Dumbledore’s Army—was to defeat Voldemort.

Given Voldemort’s cunning, it seems likely he would have known about Time-Turners. If so, he would have almost certainly sought one out – just as he pursued things like unicorn blood and the Elder Wand. Like the Time Stone in Marvel movies, a Time-Turner could have dramatically changed everything if he’d gotten his hands on it. However, the Harry Potter series doesn’t really explore this possibility, instead using Time-Turners only when it helps the heroes advance the plot.

1
Fred and George Don’t Notice a Strange Man Chilling With Their Brother

Fans have been disturbed by a major plot point in Prisoner of Azkaban ever since the book came out in 1999. Early on, Fred and George give Harry the Marauder’s Map, explaining they’ve had it since their first year at Hogwarts – they stole it from Filch! They show him how to use it. But this raises a big question: if they’ve kept the map for years and taken it home during the summers, how did they never notice Peter Pettigrew sharing a room with their brother? This is especially strange considering Ron always has his rat, Scabbers, with him.

It’s strange that the map stayed hidden in their trunks for months, yet no one noticed Peter Pettigrew living in the Gryffindor dorm with Ron. Harry clearly sees Pettigrew on the Marauder’s Map in the movie, and Lupin is the first to spot him in the book. Fred and George were clever enough to start their own business, so it seems unbelievable they wouldn’t have noticed someone constantly lurking around their brother!

The way the Marauder’s Map works in the new HBO series is confusing, and the show needs to explain it. The only logical explanation is if someone reveals the map can’t detect people when they’ve transformed into an Animagus. Even then, this wouldn’t explain how it missed Remus Lupin, since he’s a werewolf, not an Animagus. Ultimately, this is a major flaw in the Harry Potter story. Peter Pettigrew spent twelve years disguised as a rat, so Fred and George Weasley should have definitely noticed his name appearing on the map at some point. While revealing Scabbers was Pettigrew is a fantastic twist, the fact that he remained hidden for so long—especially with the twins owning the map—creates a huge plot hole and is arguably J.K. Rowling’s biggest mistake in the entire Harry Potter series.




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2026-03-12 15:40