I think I understand what you are saying, but don't entirely agree with you. It is possible for some people to "come back from hell" and to have coped with it in a pretty healthy and constructive way. The experience does not totally determine how someone reacts; it is a combination of the experience and how capable they are of dealing with it. Not the same as being "perfectly chill", but it can be done, and if it is really done, it is not pathology. And I think that it is not incorrect to say that people who have not dealt with stress adequately may become "ill". Ill in the sense that their ability to cope with stress has been impaired.

I am not saying that war, or any similar situation, is "good" -- I am saying that it is possible to go through situations that most people would consider unbearably stressful and succeed in doing so, and come out "ahead", to master the situation, to do "good" in spite of it all. Again, this is not to say we should celebrate war or other pathological events, but that we may sometimes overcome even that as individuals.