Distress is typical when we face traumatic events. Most of us, when we face very difficult losses or great suffering, will have a variety of highly distressing psychological reactions. Life crises are inevitable and we are given the choice between suffering and growth on the one hand, and suffering and no change, on the other. Post-Traumatic growth is a phenomenon studied by positive psychology.
We most definitely are not implying that traumatic events are good – they are not. Just because individuals experience growth does not mean that they will not suffer.