Its true that Hack is given "Things we tougher in my day." grumbling, but his unvarying point is that one day this Country and its military are going to get into a fight with somebody who can't be finessed with technology, but has to be fought and beaten one on one, platoon on platoon, batallion on batallion. Hack's view is that we barely got by in Korea, lost in Vietnam, and are apt to get our head handed to us if we ever get in a fight with a worthy opponent.
I don't agree with everything he says, but given that he has more each of Purple Hearts and Silver Stars than he can count on one hand, and that he was so far as I know the highest ranking officer in Vietnam to deliberately destroy his career in order to publically criticize the bungling there, he shouldn't de dismissed out of hand.