Pilots have had an above average life expectancy since people looked into it in the 1960s. I suspect because you dont invest in the career if you have poor health, and it is in your own interest to remain healthy rather than due to having regular medicals.
Our generation has seen the greatest ever improvement in life expectancy with the exception of recoveries after wars and pandemics and your observations are in line with that increase. Mostly due to better diet, less pollution, less smoking etc followed by vaccination programmes and a little bit from improvements in medicine