From what I've seen in my direct circle, childhood trauma leaves deep deep traces, and not in a good way. The idea that childhood trauma encourages growth to me sounds like pull yourself up by your bootstraps kind of rhetoric.
I said growth is the important part. If you are focusing people on identifying themselves as traumatized, you are doing it wrong. You want to focus them on how to grow. Be that be letting go, coming to terms, whatever. Really depends on the trauma.