Survival Horror games, why isn't there more survival?

I'm not a giant fan of survival horror games, hell I couldn't even force myself to finish Doom 3 when it was first released. I couldn't handle how dark it was coupled with the fact that you had to continuously switch between your flashlight and your gun. Survival horror games have changed since the years of Silent Hill, Fatal Frame, and Clock tower but the one thing that hasn't really changed is how little survival is actually implemented into the system.

Don't worry as long as I don't die I'll be fine
Don't worry as long as I don't die I'll be fine

Survival in these games have strangely only truly meant that as long as you don't die during the fight you'll be fine. It doesn't matter how many times you get hit by the enemies as long as you can make it through the fight alive you can just heal up quickly. It has made combat less of a danger and more of a hindrance, it'll slow you down but there really isn't a reason not to fight them, eventually you'll be up to full health as long as you find something to heal yourself. This sentiment has brought a lot of survival horror franchises into horror action games, and I think it's a real disservice to the genre and a lot of the fans of the genre who really want to get lost into the world they are playing. We were even given a glimpse of a gameplay system that could really bring gamers more into the mood of a survival horror game, yet no one seems to have even considered it. I'm of course talking about the survival system that was present in Metal Gear Solid 3: Snake Eater.

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This system forces you to deal with your wounds by using medical supplies you find on your mission, and if you don't fix yourself up in a timely matter you are hindered. Did you get shot during that fight? Better dig out that bullet, suture that open wound, apply a bandage, otherwise your health takes a drop. Are you bleeding out from a wound that you can't fix? You need to find some equipment or sooner or later you will bleed out and die. This system was something I thought worked so well for the story and environment that the game was set it, and it could do wonders to rejuvenate a genre that developers don't know how to evolve without it just going away from their roots and into a full on action game.

I've been astonished that there are few if any developers that looked at this system and tried to implement it into their games. What do you think? Would this be a great thing to implement into survival horror games or should we stick with the current system we have?