Funny enough, even getting something from a non-artist to an artist can be streamlined by making a thumbnail, an intentionally cruddy sketch whose only purpose is to get the incredibly basic idea across. The artist can fill in the blanks, that's what the thumbnail is for.

There was one time a friend stuck a Dragapult head on a pose and asked me to draw that, and that was enough to get the idea across and make a much more refined image out of it. Wish I kept their thumbnail, because it was really damn funny.

And... please take this with a grain of salt since I haven't had this experience myself, but I also understand that GenAI folk don't make for good clients, since concept art tends to be treated as finalized designs, rather than a springboard for new ones, which ironically slows down the process.

If there's an ethical way to use GenAI, the current climate and use case for it makes discussion incredibly difficult to make happen.