Earlier quoted context omitted.
it it all necessary, but without great genes to provide rock solid joints, cardiovascular system and lack of debiliating diseases ala alzheimer or Parkinson it wouldn't be possible. For every guy like him, there are thousands and thousands who exercise almost same, have almost as good diet and die in +- normal age, many even earlier (ie cancer, weak heart and so on). At the end it's all about managing probabilities w…
Yes longevity is basically not taking stupid risks and genetic luck on your side. Exercise and eating healthy is about making the longevity you have enjoyable.
One useful way to think about it is that genetics mostly gives you an upper bound on longevity. How you live your life can shorten that substantially.