but I think that, in the case of abusers, the system has not yet learned how to appropriately deal with these monsters.
I think the justice system is doing fine. The problem is not that the system doesn't know how to deal with child molesters, it's that it is very difficult to prosecute any crime against children because of the lack of evidence that is acceptable in court. Children make poor witnesses, and psychological damage is very hard to prove in court.
That's what makes forgiveness such a necessity. We are not going to stop child molesters by tracking them down and arresting them. It simply doesn't work. We are going to stop child abuse by working towards communities where abuse doesn't occur, where children are supported and protected. And that sort of community can't exist without forgiveness and understanding.