And Patrick Steward didn't enjoy life?
It's really enticing to think that there's some nice controllable reason why some people live longer (assuming you don't smoke, do drugs to excess, etc.) but really it's mostly genetics and chance.
And healthy eating, sleep, exercise, being sociable.
These seem within one’s agency.
I know nothing about Stewart's personal life.
I visited a cardiologist today, who has seen thousands of patients. He remarked that two big factors in staving off heart disease are staying slim and long term aerobic exercise.
Those two factors are under one's control.
(Nobody said it was easy, though.)