Why doesn't Naruto know how to read fanfiction?

Maybe because in the fanfiction, Naruto's upbringing and experiences didn't expose him to enough examples of love.

Maybe in the fanfiction, Naruto grew up in a very isolated or unloving environment, so he never experienced hugs.

Maybe in that fanfiction, Naruto grew up in an isolated or deprived environment where such concepts weren't introduced to him.

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.

Maybe it's a unique plot twist the author came up with to add some drama and challenges for Merlin.

Well, there could be various reasons. Maybe the writer wants to create a unique situation where Naruto is silent to add mystery. For example, if the fanfiction is set in a scenario where Naruto has lost his voice due to a curse or some kind of magic. It could also be that the author is focusing on other characters' reactions to Naruto's silence, which can bring out different aspects of their personalities.

It's important because it maintains the integrity of his character within the original story. If he knew about fanfiction, it would be like breaking the fourth wall and would seem out of place for his character who is supposed to exist solely within the original narrative.

Maybe Naruto just sees Sakura as a friend. He might have a different idea of his ideal partner and Sakura doesn't fit that. His feelings for her could be purely platonic.

One possible reason could be miscommunication. Maybe Kakashi has been involved in some secret missions or decisions that Naruto doesn't understand, leading to a breakdown in trust. For example, if Kakashi made a call during a battle that put Naruto or his friends in danger without fully explaining it to Naruto later.

Well, some fans might create such fanfiction because they think Naruto's relationship with Sakura was more of a friendship. They feel that Naruto had a deeper bond with other characters like Sasuke in a different way than a romantic love for Sakura.