One could say the same things about pro sports, actually. Many aspirants start very young (e.g. Tiger Woods) and put in 8+ hrs / day. Not to mention the sports

One could say the same things about pro sports, actually. Many aspirants start very young (e.g. Tiger Woods) and put in 8+ hrs / day. Not to mention the sports camps, bespoke coaching, academic tutoring to maintain eligibility - all to develop a career that's "hard" over by 40, usually much sooner.