This, rhetorical question, of course, side steps the important issue of quality of life. How long one can live free of disability? Even if we can life a long life eating Cheetos and Bacon, it's pretty clear that many of those years will be tethered to an IV bag.
But this morning, in the BBC news, I read US life expectancy declines for first time in 20 years
Here's an excerpt.
Data from the National Center for Health Statistics showed a drop for men from 76.5 years in 2014 to 76.3 in 2015, and from 81.3 to 81.2 for women.
The figures show rises in several causes of death, especially heart disease, dementia and accidental infant deaths.
Life expectancy last fell during the peak of the HIV/Aids crisis in 1993.
It has improved slightly in most of the years since World War Two, rising from a little more than 68 years in 1950.
It also fell in 1980, after a severe outbreak of flu.
This decline was not due to an AIDS epidemic or an outbreak of the flu. Instead the culprit was heart disease. Perhaps a healthy diet can't prevent the flu or AIDS. But I'm pretty sure it can prevent heart disease.
C'mon, man! Eat your potatoes!