I don't think it's as simple as having 100% play vs 100% work. There's got to be some optimum balance here that we're clearly not satisfying, with our flawed notion that 100% work is the best route. It's possible for people to have a satisfying social life while also doing very well in school, and it's also possible for a loner to have a depressing life while failing at school.
Agreed. It's not black and white and the realistic answer is something in between. It's entirely possible to work hard and still play hard, especially in your 20s/30s/40s when your body is still in its prime.