I don't know any AI artists (as in someone who prompts a model and then calls the result a work of art), although most traditional artists i know have come to incorporate AI one way or another in their process.

You don't really hear about it because it's all intermediate material used during the production phase. For example, as a hobbyist writer, one thing i struggle with is writing action scenes cause i don't have visual memory and i tend to forget a lot about continuity and "spatial realism" ("this guy starts in this corner of the room so there's no way he could grab that object at that point", shit like that). With AI I can generate some kind of "story board" of my scene, which helps me write it much better. It's just laid out visually in front of me and i catch a lot more details.

Sometimes when i'm toying with an idea i'll also have a model generate a few variations on it, with different points of view, writing style, focus etc... Even if the writing is mediocre, it gives me a really good idea of how each version could pan out, and whether an angle works or not. I'll then select the angle that works best and rewrite it entirely from scratch.

There's nothing innovative about it, people have been using assistants to avoid tedious work forever. It's just that before AI you had to, you know, be rich and able to actually pay for the labor.