if he does so great with Canon what kind of wonderful images would he do with 10 lbs Rz and a Leaf back. LOL.
I think it's about the energy, and the spontaneity, and the looseness, and the motor drive, and the moment, and not getting bogged down with gear, and being able to shoot all day handholding. And honestly, what's wrong with the quality in that image? It's going to be retouched to death, and gone over with a fine tooth comb, if it's a chosen final image.
Secretly, I'm with you, wondering how the lenses would render even better, with RZ. But you can't argue with his results. It seems to work fine for him. You think he's obsessing about RAW processors or pixels? Hell no, he's at dinner.