Are you kidding. No one is saying this should replace art.
It's just an experiment in generative algorithms. It can though have interesting applications in assisted design, which I bet you would say is not art either anyways.
I think i get what he is saying. I see code as a kind of human expression. it would be like a machine compiling itself. the machine did not make the thing, it did what a human told it to do. so a human saying draw me a cat would not be making art, only the original code and the beautiful ideas inside would be the art. art and programming share a kind of knowledge called techne. as opposed to epistme like history and such. hence why traditional artists and programmers are both so concerned with craftsmanship.