And because he's a good shot?? LOL
I can't cite the exact Picasso painting, drawing, but whatever it was showed superb draftsmanship -- at least to me. It showed that this was not some guy riding the Pop Cultural Magic Carpet Ride, 'spressin hisself -- he really knows what he's doing. Dali is another one, iirc.
Andy Warhol was another -- he actually eked out a good living as a working commercial artist -- cereal boxes'n'shit.... Very inneresting bio. Lou Reed's Walk on the Wild Side was in fact about Warhol's li'l cabal: