Creating art is not that much harder than programming, creating good art is much harder than programming. That's the reason that a large majority of art isn't very good, and why a large majority of Artists don't make a living by creating art.
Just like the camera didn't kill the artist, neither will AI. For as long as art is about the ideas behind the piece as opposed to the technical skills required to make it (which I would argue has been true since the rise of impressionism) then AI doesn't change much. The good ideas are still required, AI only makes creating art (especially bad art) more accessible.