My first-hand experience and conventional scientific-consensus is that diet matters, not only for longevity of life but also for quality of life. My Dad is add

My first-hand experience and conventional scientific-consensus is that diet matters, not only for longevity of life but also for quality of life. My Dad is addicted to sugary drinks and his feet are already showing signs of pre-diabetic nerve damage and he has lost lots of weight while his fraternal twin, who isn't addicted to sugary drinks has no such nerve problems. The role of diet and genes can actually be tested on identical twins or studied that way and pretty sure any such study will show diet matters for quality of life and length of life. The grandparent poster said something like "Conventional wisdom on Diet is wrong" is so vague to the point of almost being meaningless. No one is disputing that genes matter but to draw a logical line from Buffet saying "hamburgers and oreo are not that bad" to "conventional wisdom on diet is wrong" is a mega-leap in logic which the grandparent poster should apply for the Olympics. Mcdonalds food (in moderation) is not that unhealthy actually, but the grandparent poster is so vague I'm not sure maybe he is actually saying the same thing. My interpretation of his vague comment is that he is saying diet doesn't matter when it comes to health when there is overwhelming evidence of the perils of excess sugar and over-eating to health.