Okay, I'm just going post by post here (so please bear with me, thx). Maybe this will help you better understand it from an ooc viewpoint?
We can't do basic first aid even to stop bleeding or the like. And a person with all the medical skill in the world is useless without some type of coded item.
You can stop bleeding. Examine the medkits. Like in RL, you don't have to be a paramedic to use a first aid kit to tamp down the bleeding wound you have. Although more serious wounds do need a doctor of sorts.
As for being useless without a coded item, I do kinda agree with this. Someone trained in medicine should be able to make a makeshift tourniquet to stop the bleeding long enough to get to a doctor without dying.
Idea: Instead of a permanent stopping to the bleeding you are experiencing, maybe a tourniquet can be a temporary stop?
Well first of all, I would like to see the game update you when you're feeling better, both in fatigue and ht status. As it is now for fatigue, it will tell you every action you make that lowers your fatigue, but never tells you when you're rested, you have to just keep checking ht over and over to see when you're "full up"
I'm sorry but it does. It's not like a gas guage, true, but I like that it isn't. In real life you don't have a gas guage-like health meter. But, that said, there are indicators that show you when you are well rested and recovering however. Or that you are a little tired and recovering normally. Or little tired and recovering slowly.
If you experiment, then you can figure out what you do to become tired and what you can do (eat, rest, etc) to become less tired. Just like in Real Life, when you go to work out, what would you do? What would the difference be in working out on a full stomach opposed to an empty stomach? When you think about RL, then it seems to easily translate to the game.
Also, as Jinx wrote, you do see the injuries displayed. You do see how beat up or wounded you are. (I personally forget to look sometimes in the middle of whatever's happening. )