I mean that's a pretty big claim in my mind. I've gotten over some pretty traumatic stuff myself. It was the hardest thing I've ever done. I can honestly tell you I will claim I'm 100% at peace with my life now that I did all that work, and I honestly feel nothing but love for even my parents who were responsible for the horrific trauma.
So when you say that, my brain goes, ehhhhh I'm pretty sure all psychological damage can be undone with the correct psychological processes. It's just a question of finding the right answer. Am I saying it's likely or common? Absolutely not. But it's possible. Now we just argue about what sliding scale we want to consider as statistically meaningful and a means of testing for that.
Sorry for rambling!