How do you know that had the Castellano attempt failed, and Castellano recruited the majority of the Gambino family to seek retribution against Gotti and his guys, how do any of us know that Gotti wouldn't of flipped if given a chance? I don't think "he was a stand up guy all his life" is a good explanation, because Gravano was a stand up guy all his life and still flipped when given the opportunity.