I have a theory about that that I’ll now subject lemmy to! Professional sportsers are often heavily managed from a very young age (practice schedules, diet monitoring, weightlifting regime, traveling). Even in college they often have to sign up for special versions of classes to fit with their schedules (on top of the diet/exercise/practice/travel) making fewer of their own day to day decisions than their peers. When they leave the sport they don’t have all these other people dictating their lives anymore but they haven’t had enough experience living on their own or room to make certain mistakes they would have learned from if they’d been in charge of more of their time and decisions.