I don't know why anyone's giving this asshat any head space.
It's not like there's a new, large scale, robust research piece behind this. He's just broadcasting 'pinyons' to sell books/get attention.
He's objectionable on a number of grounds. The misogyny of it all being about the mother is one. Where are all the dads being guilted into giving up their careers and financial independence? Oh wait.
Secondly, the preachy little bit about two income families wanting the 'lifestyle' that additional money brings. That really gets my goat.
Most wohm I know aren't doing it for the fancy holidays, but for additional financial stability in the event of redundancy/illness/divorce, for additional opportunities for their DC, to set their DC up
financially, to provide for themselves in retirement, etc, etc. That's all worthwhile. Providing for the family is not solely the job of someone with a penis.