I certainly won't claim that no harassment ever takes place; every wintering team is different, and I have no doubt that plenty of women _do_ experience some form of harassment or unwanted attention. When you live in a small, close-knit community with (generally) a large gender imbalance, there will be tensions.
What I object to is the unsubstantiated claim that Antarctica "brings out the animal in each of us"; that the environment is one of such privation that all those who venture there necessarily regress to some more basic form and that standards of civilized behaviour become something we can't afford, sacrificed on the altar of survival.
This is patently false, and frankly a very limited and limiting view of the human condition.
What you like to dismiss as a "personal anecdote" I'd prefer to call "multiple seasons of lived experience in the environment under discussion."
While I can't speak for the hiring procedures of other nations, the majority of the interview process for the British Antarctic Survey centres around the interpersonal side. If you're sitting in the interview in the first place you're assumed to be technically competent; once that bar is passed they select primarily for people who will survive the isolation and be able to work as independent members of a small society. Are the results perfect? Of course not -- failures happen and bad winters happen. But they are well aware of how important social dynamics are to the overall success of the winter.
So much preventative process and yet so much violence still occurs. The environment must be truly stressful. The concept of the animal within each of us isn’t metaphor—we are literally animals. Our environment strongly affects what sort of behaviors appear in the aggregate. This isn’t to disparage your character. This is to be aware that we are all capable of evil and we must be aware of it. Process alone cannot snuff out our instincts.