> People in the military do insane amounts of cardio because it helps dealing with insane amounts of stress.

This is giving the military way too much credit for organized stress management. If military people give the impression of doing "insane amounts of cardio" it's because that's what the physical fitness tests are biased towards.

And we also won't talk about the fact that getting a psych diagnosis, especially in fields like aviation, can end your career, while managing stress via alcohol gets a wink and a nod as long as you don't have an alcohol-related incident.