When watching Alex Honnold in Free Solo, I understood there was a exceptional aspect to him, but it took me seeing him climb with other people to really grasp the magnitude.
https://nautil.us/the-strange-brain-of-the-worlds-greatest-s...
The scientist found there was a gene encoding how daring a bird would be, mostly clustered in two groups IIRC. But there was a rare variant which made them much more fearless, causing them to go much lower than the others.
However they only found birds with one copy of that variation. Turned out if a bird inherited the variant from both parents, they never pulled out of the dive and smacked into the ground, killing the bird.
These crazy free solo climbs and similar reminds me of those birds.