The failure to me seems in outsourcing your child to a daycare, vs parents having flexible schedules to actually take care of your kid (either 1 with PT job or staying home FT, or both with flexible jobs). I understand this isn't popular in our culture these days, but I imagine it has many positive outcomes for the child and family.
Today 56% of the worlds population lives in cities. That means childcare is essential for socialising a child.
A child at home with a parent until kindergarten is probably going to spend the first 4 years of their life in a small apartment with one adult, bearing in mind that many young parents are generally not well off. This is not healthy situation for the child or the adult.