Sure, that big grey area also includes paracetamol, alcohol, smoking, even caffeine... — all allowed for both students and athletes even though we know of harm they can produce.

Many sports are life-ruinous by nature (check out those NFL head injury studies), yet we incentivise people to take part in them (by paying a lot for the games).

I always cringe when I hear from pro sportspeople how engaging in sports is promoting a healthy lifestyle: I mean, sure, unless overdone like all pro sports do.