You haven’t addressed the elephant in the room: housing.
Housing costs have risen to match the switch to double income households. Now instead of 1, it takes 2 incomes just to be able to afford housing. This makes the family more brittle since if either parent loses their job both will lose the house.
And with the rise in housing costs people move further afield. Commuting times go way up and people waste more time in the car or on the train. Everybody ends up more stressed than ever before and further behind economically (compared to those whose wealth grows without working).