You think humans 100k years ago lived to 80? lmaoThat's a shitty myth spread by the incompentent medical community to fool people and sell them more garbage treatments and vaccines and convince them that we're only alive thanks to them and their "magic" when they're a bunch of failures who can't cure like 95% of the diseases out there
And yeah, during some periods of times life expectancy dropped significantly - like during the medieval plague for example - But that was pretty much an exception. Otherwise people lived more or less the same as us assuming they didn't get killed early due to a war or a revolution