Well, in the Naruto universe, there's no concept of fanfiction. Naruto is busy with his ninja world stuff like fighting bad guys, training, and protecting his village. Fanfiction is something created by fans in our real world, not part of his world. So, he simply can't access it because it doesn't exist in his realm.
The reason Naruto can't read fanfiction is multi - faceted. First of all, fanfiction is a modern - day, real - world creation mainly for entertainment among fans. Naruto's world is full of chakra, jutsus, and ninja politics. There's no infrastructure or knowledge base in his world for something like fanfiction. Moreover, Naruto is constantly on the move, either on a mission or training. His time is occupied with more immediate and life - threatening matters. He doesn't have the luxury to even think about something as out - of - place as fanfiction in his world.
Think about it. Naruto's world has its own set of literature and stories, like the tales of the Sage of Six Paths. Fanfiction is something created by fans outside of his universe. He doesn't have the ability to access our world's internet or libraries where fanfiction exists. Also, his upbringing and the nature of his society don't prepare him for such a concept. He's more into learning ninja techniques and fulfilling his duties as a shinobi.
Maybe because in the Naruto world, his training mainly focuses on ninja skills like jutsu and combat, not on literary skills required for reading or writing fanfiction.
It could be that in Naruto's world, fanfiction isn't something that's common or known, so he's never been exposed to it and doesn't have the knowledge.
Well, in some fanfiction, the story might be set in an alternate universe where the whole ninja concept doesn't exist. So, Naruto can't be a ninja because there are no ninjas in that world. It could be a world with different power systems, like magic or super technology.
Well, Naruto is a character in his own fictional world. Fanfiction often involves concepts, interpretations, and crossovers that are outside of his original story. He's used to his own established reality in the Naruto series, so these fan - created ideas would be completely foreign to him.
Maybe Nevile simply has no interest in fanfiction. Some people prefer original works and don't get into the world of fan - created stories.
Maybe Neville is too busy with his studies at Hogwarts. He has a lot of magic to learn, like Herbology and Defense Against the Dark Arts. Fanfiction might not be on his radar as he's focused on real magical knowledge.
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.
Inuyasha is a fictional character from a specific anime world. Fanfiction exists in our real world, outside of his fictional realm, so he has no access to it and can't read it.
It might be due to copyright and legal issues. Fanfiction often involves using characters and settings from existing works, and Merlin's developers may not want to get involved in any potential legal gray areas associated with reading and potentially distributing fan - made content. Also, it could simply be that the developers haven't considered adding the functionality to read fanfiction as it is a rather niche area compared to mainstream literature.