I don't think they're saying people are traumatized. That word has a meaning. They're saying people have issue reconciling the fact that their parents would do something like that to them and also that their parents are generally good people. Many people would rather not even consider that it wasn't the right call, because it makes it easier to hold those two beliefs at the same time. However, people make mistakes. Those aren't contradictory ideas if you can understand that people can be mislead.