Military First Aid isn't the same thing as civilian First Aid. Explosions aside, those usually cause traumatic amputations or worse, even the current lot of bad guys pestering our troopies use FMJ bullets. Ain't the same 1st Aid that applies to commercially available HP or SP ammo. And it requires training, especially the psychological kind, to deal with the
huge amount of blood that's involved. You can have 100 first responder kits that'd be useless with a trained first aider.
"...things like controlled meds..." Not a chance morphine will be left hanging on a wall in an unlocked box. It'd be stolen in minutes. In any case, morphine doesn't stop bleeding or deal with shock.
This says its shelf life is only about 6 weeks too.
https://www.ncbi.nlm.nih.gov/pubmed/7876368.
"...to shoot back..." First one must have a firearm and the skill to use it.
The real issue is how 'soft' people really are. Slightest wound and they fall apart. Human do not survive like say a deer can. There are lots of pictures, stories and videos of deer with horrific wounds(like legs hanging off, etc.) that will kill a human.