The one use I've found for using AI is getting it to prompt me. I'd found myself between stories, unable to settle on an idea, but I had a rough idea of the kind of thing I was looking for, mostly determined by going down human-made prompts and going "nope, nope, nope, that's crap, that's boring, that's idiotic, nope... FFS why isn't there anything with X, Y, and Z?"

So off I went to ChatGPT and said "give me a writing prompt with X, Y, and Z". What I got were some ideas that were okay, in that my response to them was more "okay, yeah, that's better than the output of r/WritingPrompts, but that plotline is still pretty derivative. Meh."

And then something happened a couple days later. Something clicked and an actual good idea came to me, one that I felt was actually worth developing further.

I absolutely would not want ChatGPT to do any writing for me. Not only would the end results be really derivative, but that's just not any fun. But there was definitely something useful in the process of asking it to echo X, Y, and Z at me so that I could refine my own ideas.