I think he is trying to imply that someone having a heart attack at 51 should not be considered normal, unless you smoke. My father is very old, there are over

I think he is trying to imply that someone having a heart attack at 51 should not be considered normal, unless you smoke. My father is very old, there are over 20 or so of his friends that died in his 50s. All of them were hight smokers. Not a single "non-smoker" friend died on his 50s, in fact they seem to get by at least to the 70s. Things like lung cancer were almost unheard of before people started smoking(before WW less than 3% of the population smoked).