Marlon908 you are changing your arguments to something completely different. The topic was why there are Faks for stopping bleeding and medics for healing and not just medpacks that heal you.
You ask why there is a separation and not just one pack to rule them all.
As already stated the combat simulation includes medics who has the purpose of treating people. If everyone could pack medpacks there would be no need of a medic, but since the game wants to include this unit in the combat simulation it is they have included the distinction.
Now as you point out, yes shooting someone in the foot enough times kills the person instantly and no this is not real life realistic, but I don't that you can make that point argue that there shouldn't be a medic unit with the functions that are included right now.
It's a bit like saying "this thing is not completely realistic and therefore we shouldn't have this other thing that is partly realistic"
I guess it's about what degree of realism you wan't in a combat simulator.
OT: The way ACE implemented the wound system was very good, while still having room for improvements.