Don't use an LLM to write for you, use it as a thinking partner.
LLMs' ideas are never good.
They're always mush, just frog DNA.
I was chatting with an author who told me he refuses to use an LLM.
But LLMs do give you a fun, well-read conversation partner to bounce your ideas off of which helps make your ideas better.
Someone told me the mark of a good conversation partner is someone with "good bounce".
LLMs have good bounce; they're willing to entertain whatever line of inquiry you want to engage in.
The bouncing back and forth of ideas is how they become better.
The discussion helps make your writing output better, even if no specific line was written by the LLM.