[DiscourseFan]

Well the human body cannot survive without outside consumption of vitamin C because our ancestors consumed so many berries and leafy greens that we probably would poison ourselves otherwise.

Your analysis is off, the human body is not infinitely adaptable. There are limits; running 5 miles a day is not going to completely offset heavy alcohol and tobacco consumption, but those with BMIs in the range of obesity who run 30 miles a week are far healthier than those who have a normal one but practice no physical exercise.

We are perhaps experiencing, currently, a broad shift in the evolutionary history of humanity; I'm not an AI nut but one could argue that one reason why health is such a concern is because there are a number of adaptations at odds with one another at the social and biological levels. One could imagine that the completion of this arc would result in a new stasis of living patterns in the same way that hunter-gatherers persisted for almost 2 million years, and our current moment is just a brief one of upheaval.