Having spent 6 months in combat myself, I've never had any respect for PTSDs. War is terrifying at times, but that is suppressed so much that I've never even dreamed about Vietnam. Obviously, you can't dwell on it or you'll go insane, so you have a built in protective mechanism to put it out of your mind. How else could I have gone after the horrible screaming I heard the first time I was in a firefight?
We were overworked to the point of exhaustion, which made us numb emotionally. The worst part, as I figured out later, was that I felt like a punching bag never getting a clear shot at the enemy, who were picking us off week after week until I only had a 50% chance of surviving my full tour. The best therapy would have been exactly the opposite of what our anti-manhood psychiatric cult would recommend. Not that I had a disorder, but it would have helped if I had gotten into target shooting or hunting when I got back to "the world" just to get the feeling of control over that kind of situation.
When I came back, every once in awhile I would get a sudden psychotic urge. I was fully aware of where it had come from, so I ignored it until it went away. No one has an excuse to give into post-traumatic urges. The Viet Cong had it far worse than even the Marines did, but their country hasn't become a basket case of lazy whining veterans and psychotic killers. If anything like that happens there, it should be blamed on Communism, not war.
War is mankind's natural state. Being a warrior is a normal step to maturity, though not a necessary one. So it is logical that humans have evolved a built-in immunity to PTSD. It is an imaginary disease, but the fatal and little discussed disease of a society that would encourage those with tough experiences to maginify their reactions and become obsessed and addicted to every emotion is what should really be cured.