It's being disciplined for targeted goals.

I.e "I'm not happy with my body/health"

You either be disciplined and eat good and go to the gym

Or choose not to be and a year later be regretful.

"dumb" people often have success because they don't overthink things and just take action with confidence which is classic risk/reward.

He has a podcast with a sports trainer (IIRC he works with UFC fighters) who explains 6 sets of 10 reps is the optimum for testosterone production.

I can't remember the exact details or science etc etc, but the 6 set/10 rep thing was discussed specifically and solely around testosterone production - nothing else.