the arma 3 engine is very realistic but the behaviour of the human players is a factor that makes for example a firefight more unrealistic cause they dont act like real soldiers would do - this results in one big difference: they die much more often, sometimes a lot at the same time (f.ex. in multiplayer) - and therefore you have to balance realism. a full first aid system is just too complicated and takes too long for the average game experience ... maybe thats something for the ACE mod...

yeah and i dont quite understand it cause this takes away so much atmosphere - for me this is one of the biggest issues for sp gaming - and especially sad cause the covering/movement system itself is really god!