Are speaking from personal knowledge?
Personal anecdotal experience of some does not back up the known statistics regarding “most”.
And even my own anecdotal experience, of my own family and friends and those that served in ‘Nam - quite a few - does NOT even back up the views driven by the anecdotal experiences of some who met tragedy or knew someone who did.
War IS hell; and those that suffer the most from it deserve our understanding, respect and support, but it is erroneous to assume that PTSD is a universal outcome of ALL soldiers; not even “most” would be close to the truth.