Came across this old thread, but what you're saying is bullshit. You're judging based on your limited perspective. So many stay up until their 60's 70's https://www.oldest.org/sports/bodybuilders/#:~:text=Jim Arrington%2C who recently turned,it again in the future.
A meditative state of consciousness isn't sustainable forever, it doesn't mean you shouldn't do it. Most athletes retire because their bodies age, not because it's a "grindy" way to live, so many love competition and wish they could do it forever. Competitiveness sets new standards and fuels expansion.
The only reason athletes retire mainly is because of their bodies. Sooo many athletes wish they could compete again, but their bodies aren't the same.