I remember a story about a Battle of Britain Veteran showing a group of Social Workers around the Battle of Britain Museum. He could see that one young lady was dying to ask him a question and she finally blurted out, did you ever get shot down. He replied that yes he did one morning and was flying again that afternoon. She was amazed and asked "didn't you receive counselling"?
I think his reply was that his counselling was a kick up the ass by his boss and told to bring the Hurricane back next time!
True or not I don't know but I think it shows how PTSD can affect different people in different ways.