I never said age of consent, read. And I never gave life expectancy from birth. Every point you made is irrelevant or wrong.

Data of those that survive until 15 in neolithic, bronze age, and 7th-4th century classical greece time periods, roughly half of them are dead by ~30, ~32, and ~40 respectively. I pulled that data from The Bases of Paleodemography, J. Lawrence Angel. Should be indexed online somewhere if you're curious. At time went on the life expectancy for the upper/ruling classes that survived childhood went up dramatically, as for the lower class it generally went up over long time periods but had large fluctuation due to war and disease outbreaks. In England in the 1200's-1700's only the aristocracy's life expectancy (who received the best medicine and proper nutrition, less likely to die from war) for a 20yr was 60-70. It would be lower for anyone else, so no, most people did not make it to 60+