Do you even do proofs in your line of work? I'm saying making publication necessary for arousal is a foolproof way to miss out on the beginnings of most of the really interesting stuff. Yeah he can read the ivy-approved materials in nature, but that would be stale. Okay, I can understand that his own line of work is much more interesting to him, that he would ignore the latest glimmerings from adjacent fields. That makes more sense than just taking peer review at face value.