Somebody kept them out of the Nam ~ made it an attractive place for folks who didn't wish to go to war, and only a fool would argue that the Guard during the Nam was heroic.
Save your umbridge for something else.
I know because my Late Father volunteered to go to Nam as a PIO for 6 months that year. He covered those units, told me about them and showed me the pictures he took of them.
He also told me about trying to give the stories and pitctures of them to one the bureau chiefs in Siagon. The chief refused to take them because they didn't show the Viet Nam War he wanted the American public to see. That treasonous bastard's name was Dan Rather.