We enforce rules in our society because they make that society better. Basic shared rules of behaviour are a precondition for social cohesion and prosperity, _not_ a luxury that we can only afford when everything else has been taken care of. This goes 10x in small groups in rigorous environments.
I wouldn't call resources in the Antarctic winter "incredibly scarce"; expeditions have been wintering South for decades now. We know what's required, and it's available, in quantity, with backups. It's true that people are trapped together for months at a time; we also rely on each other for survival. Under such circumstances, it's entirely backwards to claim "local society can't afford to have such strict standards." Just the opposite; strict standards of social behaviour are _required_ for the group cohesion and trust that's necessary for collaboration and survival.
A candidate who demonstrated this attitude would never get through BAS' hiring process. If, by some mischance, they did manage to make it South, they certainly wouldn't be overwintering.
Source: Wintered in Antarctica. Did not regress to the state of a caveman clad in penguin skins, nor did I become "prone to sexually harassing women."