Or maybe Darwinism isn't tracking true. Today's scientist says, "If reality isn't tracking the model, go with the model that funds you."
He conflates natural selection with evolution. He can't be that smart to start with.
By definition, evolution theory consists of two main elements: 1) descent with modifications and 2) natural selection.
"Descent with modifications" is normally just another way of expressing Murphy's Law that "anything which can go wrong eventually will".
So various forms of infertility are frequent "modifications".
"Natural selection" simply means such "modifications" don't get passed on to future generations, unless they somehow help individuals to survive and reproduce.
In the example of menopause, the old "grandma theory" seems perfectly reasonable to me, since even though it's highly exaggerated to say "it takes a village," it certainly does take a family to raise children, and traditionally, the bigger the family, with more support for youngsters, the better.
And nobody loves children more than grandparents, since once you're done playing with them, you get to give them back.
So, call it "natural selection" or call it "God's will", it's still just a little gift, to make grandma's life happier, and give children a better chance to grow up... ;-)