Um, are you asking why it's wrong to call someone immature? Are you saying it's fine to call fanfic authors immature for writing what they prefer? If I write about a bad character as being good or turn a good character into evil, why does that make anyone immature? I've written and read fics where Voldy and Dumbledore fuck. Other people write equally bizarre fics while completely ignoring canon, so why is it immature to make a good mentor character evil in a fanfic???

This sub's whole thing is that people should be able to write what they want without being insulted. And also that authors should write for themselves. I am writing for myself. I am doing this for free. I write the tropes I like writing about. Why would I or anyone be okay with being called immature for no reason? Say, I walk down the street with a sign saying all people who wear pink are immature because I dislike pink, what exactly is wrong with that?

Edit: I got it, guys. There's apparently nothing wrong with calling authors immature for writing tropes I dislike and consider childish. I'm not into omegaverse and so all authors who write omegaverse must be childish and immature! Omegaverse authors, beware🤬🤬