I think that is only true on first glance. But if you look a little deeper, none of the photo->painting are really accurate. The painters had more than color scheme as information. Van Gough, for example, did not always use a correct perspective. In general, the deeper meaning of art is not in the technique but in the perspective of the artist.

That said, I am amazed by the results even so.

I also want to note here, that I don't see any reason why machine intelligence could not produce meaningful works of art but it will require a new way of looking at it.