Because only the best go into the military. I did a six year tour in the Air Force. The airmen I served with were absolutely top notch people, intelligent, motivated, loyal, hard working, dependable. After my Air Force tour, I worked in civilian industry for forty years. Working in the high tech companies out on Rte 128, I never had a workforce as good as I had enjoyed in the Air Force. I had a lot of good people in industry, but the Air Force had better.
I see Trump picking the best people he can find. Of course many of them are military people, because only the best go into the military.