lots of absolutes in that post. I'd say that painting may have a far wider capacity (both good and bad) than photography, but i don't see how photography at its artistic/expressive/creative best is any less than any other medium -- dung sculpture in the right hands can be the highest form of art. It isn't the medium, but the artist.
As for Picasso and the idea that he or anyone is the greatest
From my vantage point and in the same arena as Picasso at his best, I'd take the original: Max Beckmann every time.