Earth flatter are funny idiots ... Anti-vax are harmful af

That makes no sense. “They could have lived to be old if they didn’t die”

I don't know how to put it more clearly, if you were born in the stone age (or any other age that had high infant mortality rates) and didn't die in childhood you could expect to live until you were at least 65 years old. People weren't considered a "good age" when they died at 40 or 50 in those times.