I'm sure the same could be done for editors... train it on annotated text (original + corrections), use it to generate new edits.
As a writer, I'm much happier in the revision/editing stage than in the first draft stage. I have a half-finished novel that's been half-finished for the best part of 8 years now. I'm now thinking that maybe if I feed the draft into <ML-shiny-of-the-day> with suggestions for how I want the next section/chapter to develop, it could generate some draft copy for me. Possibly several different versions. After which I'm in my Happy Editing Place, shaping existing copy to something I like. Repeat and rinse!
The end result would be 100% my work as the ML algorithm/brains/whatever would be generating new copy based on my existing copy and my vision and direction for the novel. And I get the final say on the results. Win-Win!
I think (hope) that AI, in the interim, will provide actual authors ways to get inspired by its random nature. Like painters might start with an ink blob and then paint over it. Or let AI fill in some gaps, like description of people or places, etc.