Unfortunately, solving a cultural problem is the second most difficult thing to do, after changing laws of physics. Or, as some web article I read the other day put it: society is fixed, biology is mutable.
And it's not just about two-income households. From my personal experience I can say that, even with one parent working, a poorly sleeping child can bring the parents to the brink of divorce, or depression, or both. Given the importance of loving, caring, supporting family for a child's overall health, happiness, and future prospects, it's fair to consider some interventions as trade-offs for the sake of the household. The article mentions this near the end, but then mostly dismisses the concern.
I know many couples that have merged into larger multi-partner families, sometimes as individual couples, sometimes as polycules, regardless, the commune is back lol, and just my own observation it seems an ideal way to raise kids. There's always someone around, couples can take their own time to go on dates quite regularly, the kids grow up with lots of people around and lots of friends, the close community support is just phenomenal looking. If I have kids, I will go this route.
I have one kid and we are going thus route. The nuclear family is dysfunctional by design. Partner and I both have been with them fulltime throughout their life, living off savings instead of working. This opened my eyes to how very little men are taught about caring for people and how much nonsense I was taught. Nurturing a little person from a perspective informed by anarchism reveals a whole lot of backwards thinking. We've just spent 5 days with 3 people who can actually handle facing the childhood trauma that gets stimulated through allowing a little person to actually make choices for themselves and the difference is astounding.
We can spend time together without interruption and without it being after they're asleep. There are people to help cook and clean, do so joyfully, and play and dance and sing and cuddle.
Why you're getting down voted, I have no idea. Community- oriented approaches to families, no matter what society says or does or thinks, are what humans have done for millenia.
It changes, but it's not exactly easy for anyone to predict or control the direction of those changes. Also, this malleability is not what matters in this context - "over the scale of decades" isn't very helpful to the people alive today.
And it's not just about two-income households. From my personal experience I can say that, even with one parent working, a poorly sleeping child can bring the parents to the brink of divorce, or depression, or both. Given the importance of loving, caring, supporting family for a child's overall health, happiness, and future prospects, it's fair to consider some interventions as trade-offs for the sake of the household. The article mentions this near the end, but then mostly dismisses the concern.