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 also be a form of humor. Some people find the idea of something so gross and unexpected in the context of the magical world of Harry Potter to be funny. Maybe they think it's a new and unique way to play with the established characters and settings. For example, they could write a scene where a potion - making experiment goes horribly wrong and leads to a character vomiting, just to add a comical and absurd twist to the story.
Another reason could be for creative exploration. Writers might be trying to break the mold of traditional Harry Potter fanfiction. They want to see how far they can push the boundaries of what's acceptable or expected in fan - created stories. By choosing a rather strange and unappealing concept like vomiting, they are challenging themselves to create something that still manages to engage readers, perhaps by using it as a vehicle for a deeper message or just as a way to show that fanfiction can be about anything, no matter how strange.
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.
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.
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 writers might do it to make a statement about how Harry Potter, who is used to the grandeur of Hogwarts and the wizarding world, can adapt to a very different and confined space like a fridge. It could be a study of his character's adaptability. Also, it could be a form of satire, poking fun at the sometimes overly - serious nature of the original Harry Potter stories.
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.
Probably they are just very confused. Maybe they don't really understand the fundamental concepts of either Harry Potter or Archer. Harry Potter is full of magic and wizardry, while Archer is something else entirely.