Totally agree yuki may not be mature enough, but part of why he swears so much, from my understanding, is he learned English at the track, growing up around racers in Europe so tends to swear more then the average English speaker
Alex Honnold is the best free solo climber in the world, man can climb el cap or half dome in a few hours without a rope, where it takes a normal climber days to get up. But the man literally has an underdeveloped brain, or at least part of it. After doing brain scans found out his amygdala has ZERO activation, so he literally experiences fear differently than a normal person, if at all!
If Indiana Jone was a handy man instead of an archeologist