Mostly untrue in Western Europe for more than 500 years[1] and very much untrue in North America, to an even greater extent, since after WWII especially, but also before. Relatively late marriage and forming a new household upon marriage has been the norm in Western Europe since the 1500s in the North Sea region. North America was different in having earlier marriage because of labour scarcity and land abundance but nuclear families rather than extended family households were the norm in every decade and century among European descended peoples and those who assimilate to their culture.
[1]https://en.wikipedia.org/wiki/Western_European_marriage_patt...
This mother describes the worst of all worlds. She's not involved in the lives of her kids. The kids are shuttled between her and her father. The nanny and her preschool teacher are the primary caregivers. It just isn't great. The fact that she wrote this article in the nyTimes to pat herself on the back for what a great job she's doing for society (Hint: She's not that important and society will survive without her) - is distasteful.
That's a good point but there's some detail missing here: how are the kids being raised. Historically, kids were raised within a tribal or quasi-tribal structure. When you have grandparents, siblings, cousins, uncles and aunts always around, room to play and explore, you don't need parents to be there 24/7 hovering over you. You learn independence as well as a way to interact and negotiate with others.
What this looks like is the worst of all words. The kids are abandoned to a set of nannies and managed activities, while the mother and father live their own lives.