I dunno, I think those were extraordinary circumstances, in most times and places, mothers have been with their babies more or less around the clock through the first 2-3 years at least, and fathers have been responsible for making sure both are safe and fed. Now, it’s not uncommon to see women going back to their 50-60 hour a week jobs three weeks or a month after birth.
And the upper classes, from the dawn of written history, have usually employed nannies and nursery maids ( as well as slaves, if you want to start looking at actual terminology ) to do their job as mothers.
Also, until extremely recently, women died from childbirth very often; leaving that baby and/or other children without a mother.
And extended families can be good, bad, or inconsequential.
Today, most companies give THREE MONTHS maternal leave; some much more than that.
Far, far, FAAAAAAAAAAAAAAAAAAAAR worse than mothers who work outside of the home, are the damned HELICOPTER MOTHERS, who treat their children ( even those who are in their 20s! ) as though they are fragile little things, who can't and shouldn't do anything on their own, never have to have any responsibilities, and need to be "protected" from ever being unhappy for ANY reason at all!
Your first two words , of your post, are correct...YOU DON'T KNOW ANYTHING ABOUT HISTORY, NOR THIS TOPIC!
From the beginnings of the Industrial Revolution, many women have worked outside of their homes and their kiddos, for the most part, turned out if not "okay"...NOTHING at all like the over privileged, snotty, spoiled, stupid, emotionally retarded snowflakes of today!