I listened to a young man years ago on a documentary that greatly changed my mind about risk.
He was one of those people who climbed to great heights without ropes.
However, when the interviewer said something about him being a risk taker, he very calmly replied that he avoid risks at all costs. Meaning he never moved any part of his body a millimeter without being completely aware of his surroundings, his strength at the moment, mood, leverage, etc etc. Plus of course knowing intimately where every rock, crevice and surface was on the way up and down, and how they behaved at different times of the day.
I talked about this with someone I know personally who climbs, with equipment. His response was "yep."
So what looked like risk to most of us was something he studied mightily.
In this case, there is just too much variance with wind, a stray puff of air, sun going behind a cloud, fellow faller slightly bumping him for there to be that much confidence. I thought about all that before I called him stupid, so I didn't feel any risk saying that.
Would you do it? I hope not. You'd be dead.