That's exactly the point. A few years ago, I happened to listen to someone who advocated healthy living. He argued that if we want longevity, then we should avoid tobacco, alcohol, fast food, salt, sugar, cheese, french fries, all types of meat, fish, butter, coca cola... and some 8,745 other food items. I said "No, thanks. I prefer to live up to 80 years of age, eating and drinking whatever I want rather than living up to 100 years and obeying your orders."