[malandrew]

I haven't seen all those movies, but I have seen many of them and the thing that IIRC all of them have in common is that they all use props that Hollywood can get their hands on without the cooperation of the US Army, Navy or Air Force. For example, if you wanted a military helicopter in your movie, you can probably get your hands on one, but if you wanted an aircraft carrier, then you are going to have to cooperate.

The bright side is that CG is now good enough that you can recreate most of those props entirely digitally without relying on cooperation from the military. On top of that, it is probably now also cheaper to do so in CG than seeking any cooperation in the first place. Where cooperation is still needed is consulting work to keep things realistic, but even that can be had by employing private citizens that served previously.