I think we are in a deeply entrenched domination-based society so zero-sum/win-lose is the name of the game for many people, particularly men, who have often been socialized to be more competitive. It’s not that healthy competition is inherently wrong; it’s just not appropriate for every situation, as you have so aptly pointed out. What would happen to the world if we embraced a more cooperative win-win culture? I’d sure like to find out….