Just wanted to say that this seems like a very weird statement to me.
I don't consider motherhood to be anything easy but valuing something majority of women can do over 'anything', however revolutionary, amazing or generally helpful a person can do at work seems almost insulting.
just so it's clear I'm not saying that women cannot do whatever a man can in the workplace. I'm saying women can do something that a man cannot "outside" the workplace -- that is gestate, and to some extent bond with and grow, a child.
And I know it seems like "Can't the contribute more at the workplace? Imagine a woman with IQ >= 120 What about research etc?" Well to the extent that desirable traits are heritable is to the extent we want/need these women to be mothers. And iirc the research indicates children grow optimally w/ their biological parents, both of them, and plenty of bonding time. This is in direct contradiction to the mother making deep commitments outside the home. Sadly it becomes a binary choice between being a fantastic mother or a fantastic contributor to a cause/research/business. I dont say this to denigrate anyone, but to recognize the real human limits of everyone involved.
IMO kind of like clean air/water or stable food supply we under estimate the importance of the task because of it being commonplace.
Remove the ability (or actuality) of having kids and much of our society would collapse in ~20 yrs time. All the people involved with making goods for, teaching, training, sports etc around children would be unemployed. Housing market would have a massive shift because who needs extra bedrooms? Politicians + news anchors would just Say "Women" insted of "Women and children" etc. It would completely disrupt society.