Well, in some fanfictions, it might be because the writer wants to create an alternative storyline. Maybe they think Naruto has a different type of relationship in mind, like a more platonic or brother - sister - like bond with Hinata instead of a romantic one.
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 his past traumas. Naruto grew up alone and was often shunned by the villagers. Physical touch might remind him of the times when he was pushed away or bullied, so he has developed an aversion to it in fanfiction.
Maybe in some fanfictions, the writer portrays Kakashi in a way that Naruto doesn't resonate with. For example, if Kakashi is written to be too strict or distant in a different way than in the original story, Naruto might not like that version of him.
A possible plot could be that Naruto is more interested in exploring the world outside of the Hidden Leaf Village and building relationships with other ninja clans on a non - romantic level. Hinata, on the other hand, is more home - bound and traditional in her ways. Their different outlooks on life cause Naruto to not develop romantic feelings for her. He may respect her skills as a ninja but not see her as a love interest. Maybe Naruto also has a different concept of love, one that is more based on comradeship and loyalty to the village, rather than the romantic love that Hinata desires from him.
In some fanfictions, Hinata may choose to support Naruto from afar, even though he doesn't love her. She still admires his strength and his goals for the village. However, deep down, she's constantly battling her own emotions. She might start to question her self - worth, wondering if there's something wrong with her that Naruto doesn't love her. And this internal struggle could lead to her making some difficult decisions about her future, whether it's about her ninja career or her personal relationships outside of Naruto.
Some fanfictions might center around Hinata's training and Naruto's support for her. It could be a story where Naruto helps Hinata overcome her insecurities and they become even closer friends before realizing their deeper feelings. This type of fanfiction usually has no inappropriate elements and is quite heartwarming.
Well, there are many Naruto Hinata fanfictions that focus on their relationship in a more positive and non - extreme way. For example, on fanfiction.net, you can find ones where they go on adventures together, or deal with the challenges in the ninja world as a couple. They might have stories about how Hinata supports Naruto in his Hokage duties and how they build a family together in a very heartwarming way.
Maybe they don't like fanfiction in general. It could be that they prefer the official, canon Naruto story. Fanfiction can vary greatly in quality, and they might have had bad experiences with some poorly written Naruto fanfictions in the past, which made them dislike the whole concept of Naruto fanfiction.
They can simply respect each other's preferences. The OC can choose to avoid fanfiction discussions and events while the enthusiasts can respect the OC's stance. For instance, in a Naruto - themed community, they can have separate areas or topics for those who like fanfiction and those who don't.