I agree that even 50 is being optimistic. My brother died at age 47 (2 months shy of 48)… He was very athletic, ate healthy, had no risk factors other than genetics. Anniversary of his death is this week. My dad had died a few months earlier. Mortality slapped me hard in the face that year.
Realizing there are no health guarantees, even if you eat right and exercise, was a factor in my decision to retire early… Life is short.