I agree with you in summary as well as in detail. I have had the same experience with some “Ex-military” who turned out to be clerks.
By the way, I honor your dad in his truck driving, as they are very much part of the frontline war effort. My dad’s unit, for instance, use to line up when a truck pulled in with empty spam cans and waited patiently as their cans were filled up with the truck oil that was hauled in a 55 gallon drum in the back of the 2.5 ton. Cleaned their M1s and 1911 A1s with it. Most of those rifles and pistols came back to the armories still within military spec.
Truck drivers are one of the keys to winning a war. Logistics, logistics, logistics.
Thanks - nothing wrong with clerks in uniform - they, like everybody else should take great pride in their work. Peace to you!