I find the idea that you can't transfuse yourself with saline or blood to push people to be more co-operative has failed miserably!

Everyone just shoots on sight regardless of whether I'm armed or defenceless it doesn't matter, so let me be able to work alone since no one wants to team up from what I have played.
Everyone just kills without a second thought in this game and I can't get people to help me at all they just rather kill me because I'm an easy target so I don't see the reason to rely on strangers when all they do is shoot me.

If the mechanic is not making people more friendly like it was intended then why is it there ?
It's nothing but a detriment to someone who's new to this game I don't know anyone that plays this game so I'm generally alone when I play.
Playing the game is then near impossible if I get sick or lose blood since I have to rely on complete strangers to not shoot at me(which doesn't seem to happen) when I need help with transfusions and with my luck that would be never.