I don't find AI helpful for truly constructive or creative prose, it devolves to the median output very quickly and it's almost painful to hear in my inner voice when I read out an AI-ified idea. The "not this but that" formulation is especially bad or cloying attempt at pretending to refine an idea or lightly correct something to start from a position of authority, very annoying.

That said, I have a lot of situations at work where I am asked to simplify something I am an expert in or convey something for a different audience, particularly as I prepare for presentations and I do find it helpful in helping me step down my writing or work. YMMV.

I also skip words a lot and can miss that even after 2-3 editorial passes and it's very helpful at that vs. say normal spellcheck.