/lit/ - Literature

Based on the feedback in the previous thread, I assume people here really don't like first person narrators and colloquial language?
But why? Someone said first person forces self-insertion for the reader which I just don't get. It's a story someone else is telling you. From what I've seena round the webnovel sites, first person is the absolutely dominant narration style. Or is that just because it's how light novels are written and everyone there imagines he'd be writing the next big isekai anime?