That's a true statement--infant mortality has declined and average age at death has also increased, but the increases in average life expectancy are much more g

That's a true statement--infant mortality has declined and average age at death has also increased, but the increases in average life expectancy are much more greatly attributable to the former than to the latter. The fallacy is "{disease} is a disease of old age, and people didn't used to live past {average caveman life expectancy}. Therefore humans almost never experienced {disease} until modern times." This is very far from the truth, and is usually delivered as part of a sales pitch. I was surprised to see it repeated in the OP almost verbatim. The article debunks several other fallacies but, disappointingly, perpetuates this one.