This seems unnecessarily harsh. That this generative art and painting are both visual arts in (mostly) two dimensions seems a pretty strong similarity. Why would you compare it to genres of art less similar? Also, some paintings strongly resemble this kind of generative art. E.g, I assume code could be used to generate something quite similar to "drip painting" in general, and Jasper Johns work in particular. You can make a comparison without trying to equate the two.