What exactly is “unhealthy lifestyle”? For an unfavourable variation/specimen it can simply be being born and living as even the mild environmental conditions will cause unsustainable damage. On the other hand, a strong specimen can withstand extreme environmental conditions without any long-term damage. As I said, statistics is completely useless here.
A lifestyle that has a high correlation to a disease in otherwise healthy individuals. For example smoking, excessive alcohol consumption, shooting heroin, being anorexic, being morbidly obese.
If you tell people it’s ok to smoke since you know that one guy who lived 100 years while being a heavy smoker, people following that advice will statistically more often die of lung cancer than people who don’t smoke.
I never disputed that something may be unhealthy lifestyle for some or even majority of specimen. I merely disputed that you cannot claim something is universally unhealthy lifestyle.