We have lots of evidence that putting investments in early childhood education, even evidence from very hard-nosed economists, is one of the very best investments that the society can possibly make. And yet we still don't have public support for things like preschools.
One of the best ways of understanding human nature is to study children. After all, if we want understand who we are, we should find out how we got to be that way.
Being a developmental psychologist didn't make me any better at dealing with my own children, no. I muddled through, and, believe me, fretted and worried with the best of them.