I know more stay at home moms. They are not getting leisure time while their husband is at work. At best they’re getting a bit of time while the kid(s) are napping but it’s usually time filled getting things done without kiddos slowing you down. Their husbands pitch in on childcare and household tasks after work too.
That is the exhausted state of all mothers of young children. That's usually only a few years, at the beginning of the marriage. And that is the length of time that almost all marriages last. Women either need to have more children (to extend this phase and to be "allowed" to remain home), be housewives (to increase their leisure time), or the husbands need to do A LOT more childcare and housework, to make the cost/benefit analysis of continuing the marriage more attractive.