I use LLMs in my fiction writing; and before the wolves come out to shred me to pieces: The LLM never gets to see my writing and doesn't do any of the writing for me. I use LLMs in other ways.

One of the first uses I discovered was to have it identify my own blandness. I'll give it a general scenario from my writing and ask it for ten resolutions to that scenario. If my own resolution appears, I realize at best my resolution is bland and at worst cliche.