There's now a rumor spreading that he's some sort of hidden grandmaster LARPing as a common writer, because how else could anyone make such profound martial observations? Really, MC isn't good at intricate worldbuilding so he doesn't go into specific details about how things work, keeping the focus on storytelling and leaving everything else vague and philosophical. This leads to the actual martial artists taking inspiration from their own interpretations of his writing and gaining enlightenments that are then attributed to MC's wisdom.

It's kinda funny how idolized the protagonist from his story is at this point. It's all exploded out of MC's control -- statues of the character are being built, the secret techniques MC made up are being recreated irl, etc.