One reason could be the hope for change. In dystopian novels, characters often strive to make things better. For example, in '1984', Winston Smith hoped to break free from the totalitarian regime, and this hope can be a reason to live. Another reason is the relationships. Even in a dark world, the bonds between people can give them a reason to keep going. Just like in 'The Hunger Games' where Katniss had her family and friends as motivation.
One possible reason could be cultural traditions. In some cultures, there might be certain superstitions or practices that force a boy to live as a girl. For example, if a family has a series of misfortunes and they believe that having a 'female - like' son can change their luck. Another reason could be the result of family pressure. Maybe the family has always wanted a girl and decides to raise the boy as a girl, forcing him to wear girls' clothes, engage in girl - like activities, etc.
Another reason could be related to control. Your sister might be a bit of a control freak and sees this as a way to have power over you. She might not fully understand the implications of forcing you to live as a girl and just be focused on getting her way. However, no matter the reason, it's not right if it makes you uncomfortable.
One reason could be cultural traditions. In some cultures, there are very defined gender roles, and if a situation demands, a person might be forced to live as a woman. For example, in certain religious or tribal cultures, there are specific tasks or roles only for women, and someone may be pushed into that role.
In the fanfiction, Harry Potter might live by himself because he is tired of the spotlight. After being in the public eye for so long, he desires a private life. He may also feel that living alone allows him to better understand himself and his powers. It could be that he has a prophecy or a personal quest that requires solitude. For example, he might be trying to master a very difficult and dangerous spell that he doesn't want anyone else to be in danger from if something goes wrong. Also, he could be exploring some dark corners of magic that the wizarding world might not approve of, and living alone gives him the freedom to do so without judgment.
One possible reason could be the excessive burden of his destiny. In fanfiction, he might feel constantly pressured by his role as 'the Chosen One'. The never - ending battles and the loss of his loved ones could also contribute. For example, if he loses Hermione or Ron, it could shatter his will to keep going.
One possible reason could be the continuous loss of his loved ones. In the original series, Harry has already endured so much pain from losing Sirius, Dumbledore, etc. In the fanfiction, perhaps there are additional deaths or betrayals that push him over the edge. Another reason might be the overwhelming burden of being 'the Chosen One'. The constant expectation to save the wizarding world could finally break him.
One main reason is the high demand for exotic pets. Some people are willing to pay a large amount of money for rare animals, which encourages traffickers. Another reason is the use of live animals in traditional medicine in some cultures. For example, certain parts of some animals are wrongly believed to have medicinal properties. Also, the lack of strict law enforcement in some areas allows traffickers to operate more easily.
One reason could be the extreme hardships the characters face in the original story. For example, Harry has lost his parents, faced Voldemort numerous times, and seen many friends die. In fanfiction, this could be amplified to a point where a character feels they have no will to live. Another aspect could be related to the sense of isolation. Some characters, like Snape, were always sort of alone in their struggles, and in fanfiction, this could lead to a loss of the will to live.