Not sure why you're thanking Dan. He's not exactly supporting your point, above.

As for the effects of lack of instruction in wearing basic military gear, as a Security Police Augmentee in the Air Force in the '80s I got ZERO instruction in this during basic training. Actually, I never even saw field gear until several months later, while my first base was preparing for a NATO readiness exercise. [Can't remember what these were called, but they happened twice a year). So the first time I had to drop and roll under simulated fire I couldn't manage it, since I had made myself rather too wide in cross section. Then when I later had to roll out of a vehicle (also under simulated fire), I lost a magazine* to a tie-down clip. And I don't think I'm substantially stupider than the typical recruit.

BTW: The Air Force (at least at that time) didn't bother with keeping dummy training rounds at its overseas bases. So we got a full issue of live rounds for every exercise.

So it would likely be to the advantage of a military force to train all recruits in how to properly dress, particularly when (as is probable in the future) military dress becomes even more specialized and different from civilian dress.