Maybe the writer wants to create a more cerebral or detached version of the story. Without emotions, the focus could shift more towards the pure logic and mechanics of the wizarding world. It could be an experiment to see how the story unfolds when the emotional element is removed. Another reason might be to show the contrast between a normal, emotional Harry and this new, emotionless version. It can highlight the importance of emotions in the original story.
One possible reason could be to explore a different side of the character. By taking away his emotions, the writer can show how much emotions actually contribute to his actions and relationships. It's like a 'what if' scenario.
It could also be related to his self - preservation in the wizarding society. In a world full of magic and danger, showing too much emotion might be seen as a weakness. Harry, being aware of this, decides to shut out his emotions to appear stronger. He has faced a lot of scrutiny and jealousy from some students and even some adults in the wizarding world. By suppressing his emotions, he hopes to be more respected and less of a target.
One possible reason could be to protect himself from the pain and loss he has endured. After all he's been through, like the death of his parents, Sirius, and so many others, turning off his emotions might seem like a way to avoid further hurt.
One reason could be to explore the darker side of Harry's character. In the original books, he faced a lot of trauma, and this could be an extreme way to further analyze how that could potentially affect him.
Perhaps he was cursed. In the wizarding world, there are many dark curses that could affect a person's mind, and one such curse could target his emotional understanding. Also, it could be due to his isolation. Harry has often been alone or felt alone, and this lack of regular social interaction with a diverse range of people could have made it difficult for him to develop a normal understanding of emotions.
One possible reason is to show a contrast. Since Bill is often seen as a reliable and good - natured character in the original series, making him 'suck' in fanfiction can create a shock value and make the story more interesting. It can also be a way to explore the flaws of a seemingly perfect character.
Perhaps some writers want to break free from the traditional view of Harry. They might think that by making him a 'bad boy', they can create more interesting conflicts and relationships within the fanfiction. Another reason could be to appeal to a niche audience who might be interested in seeing a darker or more non - conformist version of Harry Potter. It gives the writer a chance to re - imagine the whole 'Harry Potter' universe from a different perspective.
One reason could be for shock value. Writers might want to create something that stands out and grabs the attention of readers in a very different way. Another reason could be to explore a unique power dynamic between the two characters. Maybe the writer wants to show a different side of their relationship, like Sirius being in a more authoritative position over Harry in an extreme way.
One reason could be that the official Harry Potter canon is so extensive and detailed that it overshadows fanfiction. The original story has such a rich world, characters, and plotlines that it becomes the main focus for many fans, leaving less room for fan - created stories.
One reason could be safety. Some fanfiction authors might think that Hogwarts is too dangerous for Harry, so they make him homeschooled to keep him out of harm's way.
Some fanfiction writers may have a different vision for Harry Potter's character. They might see him as more of a diplomat or a healer within the wizarding world, rather than a fighter. So, they write stories that reflect this different view of the character, where he uses his wits and other skills rather than engaging in physical or magical combat.