It's a tragedy so many died, between terrain and the competitive spirit required to do this type of race, carry extra gear or deciding, "No, I'm going to stop" isn't in their DNA. I'm assuming a race in China is not organized by the same group that would run the races here, although, IDK if their is an international organization overseeing these events or not.
If I was going to characterize ultra-marathoners as a type of dog breed, they would be a cross of some type of dog with great endurance and a body frame of a greyhound. They certainly aren't Huskies or Norwegian Elkhounds.
It begs the question, what does the ideal athlete look like? We have such specializations, runners, hockey players, soccer players, the NFL has different body types by position, LB's, TE and Strong safeties maybe being the positions where they have the ability to do different things. Are decathletes the most versatile from track and field?
Would have making it mandatory they carry a space blanket and something tiny and packable have helped?