AI is going to destroy art the same way Photoshop, or photography, or pre-made tubes of paints, destroyed art. It's a tool, it helps people take the idea in their head and put it in the world. And it lowers the barrier to entry, now you don't need years of practice in drawing technique to bring your ideas to life, you just need ideas.
If AI gets to a point that it can give us creative, original, art that sparks emotion in novel ways...well we probably also made a super intelligent AI and our list of problems is much different than today.