I don't think longevity should be necessarily associated with health. I know lots of elderly people, and not so elderly, who are in miserable condition.
I hope I do not live too long, but I sure don't want to spend any more time feeling lousy. I can't eat gluten, limit Sugar and grains and eat mostly organic and refuse to take pharmaceutical drugs and I still have lots of problems.
I kind of blame doctors in my youth for causing the problems I now have from drugs and Antibiotics they prescribed. And that email going around that says "I ate Wonderbread and drank copious amounts of pop and I turned out fine..." That is BS.
I am the result of the North American prepackaged diet because my mother thought that if it came in a box and was ultra pasteurized, bleached and fortified with synthetic vitamins, that made it wonderful.