I think I kind of get what you mean. As I started learning to draw the human figure I began by copping the styles of Mort Drucker, etc. In time though I had cribbed and combined from so many that the result became I suppose my own style. These LLMs of course learn from every artist they are trained by.
But I didn't mean imitating the art "style" but imitating the art itself — to that thing that makes it "art" and not "graphic design" (whoops, whole new can of worms). I think, as Nick kind of said, you can't really imitate that. It has to come from your own failures and disappointments in growing up, in a life lived not mimicked.