I call bs.
How old was Ben Franklin, et.al?
take away the infant/early childhood mortality no way 37-38 years
Its an average. An average. It doesn’t mean there aren’t some people who are going to live long lives.
The average of those times had more infant and childhood deaths. Further, the more elite/higher you were in society, the more likely you’d live longer. Better food, better care, better shelter, less dangerous work.