The writer might be interested in exploring how a small change can have a big impact on the story. The confiscation of glasses can disrupt the normal routine of a character. It can change the way they interact with others, their performance in school or in magical tasks. It can also be a way to introduce new characters or settings as the character tries to get their glasses back.
One reason could be to explore the vulnerability of a character. In the 'Harry Potter' series, glasses are an important part of Harry's identity. By confiscating them, the writer can show a different side of the character, a more helpless side. It adds a new layer of depth to the character's story.
For the drama. It creates a sense of vulnerability for Harry. His glasses are an important part of his identity, and without them, he's at a disadvantage. This can heighten the tension in the story.
In the fanfiction, if Harry Potter's glasses were confiscated, he would be at a huge disadvantage. His ability to observe his surroundings, which is crucial in the wizarding world full of hidden passages and magical creatures, would be severely hampered. Without his glasses, he might not be able to recognize friends or foes quickly. Also, during Quidditch, he wouldn't be able to see the Snitch clearly, and his team could lose the game.
Well, some people might write it for shock value. They want to create something really out of the ordinary that will make readers go 'wow' or 'eww'.
It could be a form of expressing a very different view of the Harry Potter universe. Some writers might feel constrained by the relatively positive and heroic nature of the original story and want to break free by creating something extremely contrasting. But this kind of fanfiction is likely to be frowned upon by many in the fandom. The original series has themes of love, friendship, and heroism, and this type of 'beaten to death' concept is a complete deviation from that. It might also be a result of the writer having some personal issues or a very different understanding of the characters and the world, but it's not a typical or welcome addition to the fanfiction landscape.
Perhaps they are fans of 'what - if' scenarios. In the original books, Harry marries Ginny. But by writing him with Fleur, they can create alternate storylines that deviate from the canon. This can be exciting for both the writer and the readers who enjoy exploring new and unexpected plot directions in the beloved Harry Potter world.
Some writers might create this type of fanfiction to explore a different side of Harry's character. By making him submit, they can show his vulnerability in a new way. It could also be to create a more complex relationship between Harry and his Muggle relatives, adding a new layer of drama.
To explore different character arcs. Maybe they think that if Harry hated Ron, it would force both characters to grow in different ways. It could be a way of looking at how their personalities would develop without their friendship. Also, it could be a way to introduce new plotlines and conflicts in the Harry Potter universe.
Some people might think so if they only focus on certain parts, like the dark magic used by the villains or the dangerous situations Harry and his friends get into. However, the series as a whole is not about promoting dark things. It's about the fight against the dark, and the positive values of friendship, loyalty, and courage that the characters display. So, it's a wrong view to consider it dark fanfiction.
It could be that they haven't really delved deep into either story. They might be making a hasty comparison because both 'Harry Potter' and 'Dracula' are part of the fantasy genre. However, when you look closely, 'Harry Potter' is about a boy wizard in a school learning magic, while 'Dracula' is about a vampire preying on humans. The storylines are completely different. Also, the magic in 'Harry Potter' is more structured and related to spells and potions, whereas in 'Dracula' it's more about the supernatural powers of the vampire. So, it's really a baseless thought.
Perhaps they don't fully understand the depth of the world - building. They might see all the magic and think it's just some random, crazy ideas thrown together like in a not - so - well - thought - out fanfic.