Not quite true CJ. PTSD is actually not just a product of your environment at all; merely managing your environment and exposure to stressors helps keeps symptoms reduced. With or without this though, PTSD can and does created symptomatic recourse due to the physical change in neurological shift within the brain (the aspect making it incurable). PTSD actually presents the same in this manner as say Schizophrenia does, usually though Schizophrenia is simply more active than PTSD in the psychological aspect. Schizophrenia is simply a more progressive psychiatric disorder than PTSD is.

Both are quite deadly when uncontrolled. Schizophrenia typically just means your going to be medicated your entire life, PTSD does not as you can manage a majority of the impact it plays within your daily life through management skills. This does not mean PTSD goes anywhere though, and it still usually plays a daily part within your life. It really depends just how bad an individuals PTSD is.