I am very much convinced of this effect, and would like to see the idea enter the lexicon. It's from this: Why ’6 Reasons I’m Happier Because I Went to War’ went viral
It's always been my view that difficult experiences can eventually result in painful psychological growth as often as they can result in lasting damage. It used to be called the School of Hard Knocks but I call it "Reality Therapy," and it's all the therapy most people ever get.
Psychotherapy, in it's most penetrating and exploratory forms, is nothing more than controlled psychological trauma, just as surgery is controlled physical trauma.