if you lived that long...Ricketts, malaria, cholera, yellow fever, tuberculosis, typhoid, Dysentary...
And if you are a woman: a baby every year from the date of marriage until you either die of childbirth (one in four women) or go through menopause.
Ah yes, the good old days.
Eighty years was chosen to represent a period of history, but people did live that long back then.
Benjamin Franklin didn’t even leave office until he was 82 and he was born in 1706.
President Madison’s life spanned from 1751 to 1836, closely matching my choice of 1760 to 1840.
Your description makes it sound like life wasn’t worth living until your time.