I submit that since you do not have the benefit of first hand experience,  all you "know" is what you have been told or read.
There is myth making after the horror of every war has worn off.
There are are always  glory hounds seeking unearned accolades.
There are countless thousands that serve in support roles because that is the job they were given and trained to do. Seldom did you get to pick your role. 
Whether a "Vietnam Vet" served in country, in a support role or in some other theater, at least when called, they answered. I know, from close observation, that most who served in that nasty piece of business did not support the war either. But...they answered the call.
How we were treated returning CONUS is not a myth. A telling and easy validation is to compare how WWI, WWI, DS and OIF Vets were upheld (rightly so) compared to Korean and Vietnam Vets upon there respective returns.
I hope you don't presume to know the mind of Mr. Musser and how it influences his current situation.