Popolizio is still struggling to walk because of the frostbite on her feet, and her teeth may be fractured from days of violently chattering from the cold.
Day hikers are usually the ones at most risk (not enough equipment to deal with changing conditions). Mountains and Mother Nature can be brutal. I know it's a bummer to have to carry extra stuff that you likely won't have to use, but it's not just prudent. It's necessary.