I'm not the one who downvoted you, but this is misleading. The low number is because of massive infant and child mortality. Today it is vanishingly rare for a baby to die immediately after being born; back then it was commonplace; maybe 10-20% of births. All these zeroes and ones drag down the average; old people lived almost as long as they do now.
FWIW, life expectancy for a white male in 1789 was just 38 years old.
https://www.mcall.com/news/mc-xpm-1987-06-28-2569915-story.html
That was heavily skewed due to infant mortality.
I'm not the one who downvoted you, but this is misleading. The low number is because of massive infant and child mortality. Today it is vanishingly rare for a baby to die immediately after being born; back then it was commonplace; maybe 10-20% of births. All these zeroes and ones drag down the average; old people lived almost as long as they do now.