Well, there is the question–how traditional is it, really?
One thing I’ve only recently noted is that the concept of “house cleaning” as a chore doesn’t really feature in the world of the Bible. You hear about ritual purification in the law books of the Old Testament, but house cleaning as a large share of a woman’s time just does not occur in the Bible. See, for example, the famous Proverbs 31 woman–lots of different kinds of work being mentioned (buying and managing a vineyard, trading, textile manufacture) but no house cleaning whatsoever, and the work she does doesn’t really sound like a mid-20th century housewife’s duties. (Although she is praised for getting food for her family from far away–which does have an analog in modern times.) Also, she explicitly has lots of household help. And there’s surprisingly little mention of childcare.
There is historically a lot of flux in domestic duties. To give just one example, when I was a kid, ironing occupied vast amounts of my mom’s time (as well as mine and my sister’s). Nowadays, I buy no-iron dress shirts for my husband and no-iron dress shirts for my kids for school and can go years without touching an iron. However, my mother (God bless her) didn’t do a fraction of the kid-driving that I do. She had the school bus to ferry us back and forth, whereas I’m driving kids back and forth to school, camp, therapy, music lessons, etc–stuff that just didn’t exist in the world of my childhood. She also spent maybe 1/10 as much time and energy on children’s school work as my husband and I do.
Similarly, in times past, laundry was not part of the sphere of responsibility of the mother of a prosperous family. Modern progress (the washer and dryer) have saddled the middle class mother with a major job that in times past was the responsibility of…the washerwoman or laundress.
washergenes.wordpress.com/2006/06/15/english-laundresses-a-social-history-1850-1930/
I would suggest that while there are certain obvious benefits to a SAHM/working dad split (dad doesn’t lactate and more often than not, dad makes a lot more money than mom ever could and somebody has got to watch the kids), some pragmatism is in order. Mom and grandma and great-grandma and great-great-grandma and great-great-great-grandma did stuff a certain way because of the practicalities of their situations, but as times change, the practicalities change, too.