Perhaps there simply are no fanfiction works available in the wizarding world. The infrastructure for creating and distributing fanfiction, such as the Internet or fan clubs, doesn't exist there. Harry is too busy with his own life at Hogwarts, dealing with classes, Quidditch, and the constant threat of the Dark Arts to even think about something that doesn't exist in his realm, like fanfiction.
Maybe he lives in a world where fanfiction doesn't exist or he simply doesn't have access to it. For example, in the wizarding world of Harry Potter, their literature mainly focuses on magic textbooks, historical records of the wizarding world, and some classic wizarding novels. Fanfiction might be a completely foreign concept there.
There could be a more practical reason. Fanfiction might be considered a distraction from his real duties and studies in the wizarding world. Harry has a lot on his plate, like fighting against Voldemort, learning new spells, and dealing with the challenges at Hogwarts. Reading fanfiction could take away his focus from these important matters, so he is not allowed or simply doesn't have the opportunity to read it.
Another reason could be that reading fanfiction makes him feel more connected to the wizarding community outside of Hogwarts. He gets to see how different people from all over the world perceive him and his friends. It's like getting a peek into the minds of his fans, and it can be quite fascinating for him to see the love and imagination they pour into these stories.
It could be that Harry reads Harry Potter fanfiction to feel more connected to his fans. By reading what they write, he gets a sense of how they view him and his friends. He might also find comfort in the fact that his story has inspired so many people to create their own tales within the same universe. Fanfiction can be a form of flattery, and Harry might enjoy seeing how much his story has captured the imaginations of others.
For entertainment. Just like anyone else, Slytherin students would be interested in exploring different stories set in the Harry Potter universe.
He could be looking for different perspectives. Fanfiction often has unique takes on the characters and events. For instance, some fanfictions might focus on the backstories of minor characters like Neville's family history in more detail. So, it gives him a chance to see the wizarding world from different angles.
Maybe the ministry reads Harry Potter fanfiction because they are interested in the creativity of the fans. Fanfiction can offer new perspectives on the existing story, and they could find some interesting concepts that could potentially be incorporated into their own understanding or even the official wizarding world in some way. Also, it could be a way for them to monitor if there are any dangerous or subversive ideas floating around in the fan - created stories.
Because they love the Harry Potter world so much. Fanfiction allows them to explore different scenarios and characters' stories that are not in the original books. It gives them a chance to dive deeper into the magical universe they adore.
Maybe it's due to some sort of restriction. For example, if he is in an environment where access to such non - official fictional works is blocked, like in a strict educational institution or a place with limited media access.
It could be that in this fanfiction, Harry was raised in an environment where reading wasn't emphasized or accessible. Or perhaps he had a traumatic experience that made it difficult for him to learn to read.