What I do think is a problem with modern life is that people are becoming dominated by thoughts that they are doomed, unless.....
Take dehydration, nothing wrong with being thirsty and learning self-control. We are designed for feast and famine of both food and water. I have waited longer in the snow for a lift than three hours as have many people one way or the other. Think of the business of survival times in water and the pessimists claiming how short it is then see people taking a swim off Swanpool beach every day of the year.
I do not deny that cold, lack of food, wet etc are killers but what about the poor homeless on a park bench in this weather? A few die, very sadly, but most wake up to another miserable day.
Shackleton never lost a man on his expeditions and I doubt that they were all exceptional.