There's something wrong with your sample. I personally know multiple mothers who deeply regret the physical damage done by pregnancy and birth, and don't feel even a little bit stronger for having spent a month on hospital bed rest with pre-eclampsia, or tearing their vaginas during birth and being unable to lift their own newborn baby, or weakened abdominal muscles from pregnancy so she still isn't allowed to run with her baby now five months old, or spending six months unable to keep down water and losing weight due to morning sickness. They're grateful to have the kid, yes, but they don't delude themselves that it was a wonderful spiritual experience.