It is up to society to bring about the needed legislative changes. Children cannot vote. A child in danger must be protected. Once his or her safety is assured, and only then, we can begin the process of working with the abuser. Currently, most incest offenders are left in the home on the ground that they are the family bread-winner, while the victim is placed in another setting.
Children have a short life as children.
We must impose standards for parenting. You need a license to drive a car. Because if you can't drive to a minimum standard, you endanger everyone on the road. An abusive parent is a far greater danger to society than any drunk driver. A moral society will not set standards for becoming a parent, but it will establish irreducible minimums for maintaining that sacred status.