I dunno, I know several people in their 80's. My dad is 85. I always expect "stars" to die a bit younger. They live a fast-paced, high-stress lifestyle, and there may be too much sex, drugs and booze along the way. "The candle that burns twice as bright...etc". I saw that French actress/singer Juliette Greco died about a week ago at the age of 93.
My father is also in his mid 80’s, so you do bring up a valid point about stars living that type of life.