Those questions aren't interesting. Anything someone decides to regard as art is art. Can it be good art? As a tool AI can be used by a good artist to make good art.

If one merely needed to press a button on a machine to make good art, then it seems such a machine would quickly obsolete itself. Heck, with generative images we're already there. People see an AI generated image and they go "Oh, it's just more of that AI stuff."

I think it's fair it's fair to claim that by definition, if AI can make it all by itself, then it's not good art, because if AI can make it all by itself, then it's already in the "been there, done that" pile. As a tool however, a good artist can use AI to make good art.