It could be due to the pressure and expectations on him. As 'The Boy Who Lived', everyone has certain expectations of Harry. Physical touch might be something he associates with being too close to people who have these expectations. He may feel that touch could lead to him being pushed further into roles or actions he doesn't want to take. He wants to maintain a certain distance to preserve his own sense of self and freedom.
One possible reason could be his past traumas. Harry has faced many dangerous and life - threatening situations. For example, the numerous attacks from Voldemort and his Death Eaters. These experiences might have made him overly cautious and averse to physical touch as it could potentially be from an enemy. Also, his upbringing in the Dursley's household wasn't exactly warm and fuzzy. The lack of positive physical contact there could have contributed to this fear.
Perhaps it's related to his magical abilities. Touch can have different magical implications in the Harry Potter universe. He might be afraid that touch could lead to an unwanted magical connection or transfer of power. For instance, he's had some strange experiences with magic when in contact with certain objects or people. This fear could be a subconscious self - protection mechanism to prevent any unforeseen magical mishaps.
One possible reason could be his past experiences with some cruel adults, like the Dursleys. They treated him horribly, so in fanfiction, this trauma might make him generally fearful of adults. Another reason could be his experiences with certain authority figures at Hogwarts who may have been strict or unfair, which could be exaggerated in fanfiction to create a fear of adults.
Maybe Harry discovers some things from Dumbledore's past that seem unethical to him. For example, Dumbledore's association with Grindelwald in his youth. Harry, who has a strong sense of right and wrong, might find it hard to trust someone with such a controversial past. And in the fanfiction, the author might explore how these revelations shake Harry's faith in Dumbledore.
One reason could be a reaction to the Ministry of Magic's mismanagement. In the original story, the Ministry often made mistakes and had corrupt elements. In fanfiction, this could lead to Harry becoming an anarchist as a way to oppose such a flawed system.
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.
One reason could be to explore the darker side of human nature. Even though Harry is a hero in the original series, fanfiction writers might want to see how he would be affected if he was pushed to his limits. Another reason is to create a more complex and controversial storyline. It grabs readers' attention as it goes against the normal perception of Harry.
One possible reason could be past trauma. Maybe he had a bad experience in his childhood, like being bullied or physically hurt by someone. Another reason might be related to his magical abilities. He could be afraid that being touched might somehow disrupt his magic or cause an unexpected magical reaction.
One possible reason could be fear. Maybe he's heard some scary rumors about Hogwarts, like the Forbidden Forest being full of dangerous creatures. Another reason might be that he doesn't want to leave his normal life behind. He has friends in the Muggle world and he might be reluctant to give that up for a world full of magic that he doesn't fully understand yet.
Well, it could change his relationships with his friends. For example, Hermione might be more understanding and try to communicate with him in non - touch - based ways. Ron, on the other hand, might initially struggle to understand this new aspect of Harry. This fear can create new dynamics within their friendship. They might have to find alternative ways to show support and affection.