Well, I guess the numbers don't lie, but I see things the way you do. Also I see many large families where I live (an exburb) and I see the stay-at-home mom has become a status symbol---means the husband makes LOTS of money.
I do think many women who are now in their 40's were fed a line that they could have it all, including postponing childbearing pretty much indefinitely. The day came they wanted kids, but found out--oh really--fertility does start to decline with the years.
I've noticed lately that guys seem to be the one's putting pressure on their wives to work. Many would rather stay home but it's that 2 income thing. Why live in a big house, if you have to work all the time to make payments?. Kids don't care. They would rather momma be home.