I have a friend / cousin, an editor. They gave me an interesting description of editing a ~memoir whose author used an AI in the writing process, and then went back and forth between the AI and my, extremely able editor cousin, to finish the manuscript. The author prompted the AI that he was deferring to the editor, for some things, and also took valid suggestions from the AI with regard to including more human and personal feelings about remembrances.
I've never had a chance to use it because my job isn't that kind of a job but I imagine the temptation to use it for people who struggle with ideas or aren't good writers (but want to be) would be hard to resist.
And in my case, it's not so much 'temptation that is hard to resist' but rather direct orders from above: We either start using AI or we won't be around next year.
I found this to be revelatory.