Bryan Caplan has a newish book called Selfish Reasons to Have More Kids. The core argument is that people overestimate what they can do as parents, and so they enjoy parenting much less (and their children enjoy childhood much less) than they otherwise would.

The evidence for this is that twin studies reveal very small or nonexistent parenting effects for important life outcomes. People have a hard time accepting this. A lot of the activities parents force on their kids are actually about status maneuvering within the parents' peer group.