I still don't see a refutation. The life expectancy 150 years ago was considerably shorter than it is today:
Life Expectancy by Age, 1850–2004 — Infoplease.com
You are trying to apply today's knowledge and standards to people 100 or 1000 years ago when they had no access to such knowledge or medical help. People died young because, by our standards, they were ignorant.
What was normal then is abhorrent to us today but we can't judge them by our standards. The Europeans who made it their mission in life to try to kill of the aboriginal populations of the world did so because they thought it was their god given duty to rid the world of godless savages. They were led to believe by their leaders, that what they were doing was righteous. We know that they were wrong but they thought they were right. Same thing with child marriage. Women were considered chattel, expendable and possessions. Today we think that is just terrible but that is the way they were raised. Don't forget, that it has been, and continues to be in many cultures, the women who perpetrate some of these awful practices, like genital mutilation.