Weather isn’t necessarily the issue. How well one is protected against the elements is the issue. People have died from exposure in 60 degree weather. All it takes is a three degree drop in body temperature to experience slowed reaction time and confusion.
If the temperature was 40 degrees and wet and Cooper was traveling at high speed in the dark falling in a business suit and loafers, then he would have been at far greater risk for hypothermia than a professional jumper with an insulated outfit, gloves, boots, goggles, and helmet.
I don’t think that’s a particularly provocative thing to say.