Much of the increase in life expectancy over the last century is due to reduced infant mortality and improved sanitation, not increased longevity in old age.

“though it's true that now in 2020 or almost 2021 we can prolong life with uh but not prolonged quality of life uh and we might be living a slightly uh longer amount we actually i don't think we're actually living that much longer and that many of the estimates of of life expectancy that are changing over the last 100 years have to do with decreasing infant mortality and sanitation rather than increasing quality of life into our elderly years”