I have known many people 90-100+ and not a one of them was a vegetarian, heck, most of them barely ate fruits and vegetables at all! and none of them exercised either!
If fruits, vegetables and exercise were the keys to living longer, nearly all 90+ people would be vegetarian athletes. And yet nothing could be further from the truth!
With all of our modern conveniences we have gone soft. That's probably what's killing us. The old timers could burn up the fat just from daily living 24/7, while our activity might consist of an hour at the gym. They seemed to be almost immune to the diseases precipitated by excess fat, sugar, carbs and what not