The author says in the article "my own hand, the single most valuable asset I possess", but I'd say that much greater is the artist's eye——the artist doesn't just accept every line that flows out of their pencil, but knows what to throw out, what to redraw.
The infamous stereotype of AI art, the hand with too many fingers, is the outcome of a lot of people being given an artificially skilled hand without the skilled eye to go with it...
The AI artist who doesn't just cede to the AI, though, is bringing their own hand and eye to the work, not accepting the mere output of a prompt, but actively remaking it as an expression of their own craft and vision.