The fanfiction changes the traditional view in that it portrays Harry as someone who can say no. In the original series, he was almost always on the side of Britain and its wizarding world. By refusing to help, it gives a different perspective on his relationship with the country. It might also make readers think about the concept of heroism in a different way, as a hero doesn't always have to be at the beck and call of his homeland.
One possible reason could be that he's tired of being used by the British wizarding world. He has faced so many challenges and been through a great deal of trauma, like fighting Voldemort multiple times. He might feel that it's time for others to take responsibility and that he wants to focus on his own life for a change.
If Harry Potter refuses to help fanfiction, it might result in some fanfiction losing a bit of authenticity in the eyes of fans. Since Harry is such an iconic character, his absence of support could make some people view certain fanfictions as less legitimate. However, it could also encourage fanfiction writers to develop their own unique voices and storylines without relying on the character's 'approval'.
Hermione Granger is often a key character. Her intelligence and knowledge of magic could help plan the escape. For example, she might find a way to bypass the magical barriers around Britain. Ron Weasley could also be involved, providing his loyalty and courage. He might help Harry fight off any threats during the escape attempt. Additionally, Dumbledore, even if it's in spirit or through some pre - arranged plan, could play a role in guiding Harry's escape.
One possible reason could be that Harry has grown tired of being Dumbledore's pawn. He might feel that he has been constantly pushed into dangerous situations for Dumbledore's grand plans and he just wants to focus on his own life and safety for once.
Perhaps in the fanfiction, the Ministry of Magic in Britain is depicted as corrupt or ineffective. Harry Potter, being a hero who values justice, would be frustrated with such a system. He might then grow to hate Britain as a whole because of this broken system that's supposed to protect its magical citizens.
In some fanfictions, it might be through the over - expenditure on magical infrastructure related to Harry Potter. For example, building huge Hogwarts - like schools all over Britain could drain the economy. Also, the cost of magical creature conservation, which is highly emphasized in the Potter universe, could be exorbitant if implemented on a large scale.
In some fanfiction, the 'Harry Potter' world might be depicted as ruining Britain by changing its social structure too drastically. For example, if the wizarding world suddenly becomes fully exposed to the Muggle world in a fanfic, it could cause chaos. Muggles might panic at the existence of magic, and the established order in Britain, both in the wizarding and Muggle parts, could break down.
In certain fanfiction, the magical education system in 'Harry Potter' could have a negative impact on Britain. For example, if Hogwarts starts to produce poorly trained wizards due to a change in curriculum or teaching staff. These incompetent wizards might then go on to make mistakes in using magic in the real world, causing accidental damage to infrastructure and endangering lives in Britain.
It could mean that the official Harry Potter franchise doesn't support or allow fan - made fictional works. Maybe they have certain copyright or brand - image concerns.