True. Very true.
As much for the Air Farce (nowdays) as for the Army. Army missiles, army weapons, army uniforms, army vehicles.
The Navy? Similar: The designs are based on assumed “computer modeling of assumed battles.” The ships can be destroyed in harbors by mines laid overnight by pleasure boats, and torpedoes shot from fishing boats and trawlers.
Back in the ‘80’s, I was a member of the first PATRIOT battalion the army formed. We did the final acceptance testing for the system out at Ft. Bliss. When those familiar with the ability of other AD systems to be air-dropped would ask us if the PATRIOT could be air-dropped, we would tell them, “Sure... once.” :)