There is also another interesting observation I discovered while playing paint-ball.
In the game/propaganda tool, Americas Army, there is a stress meter. The lower it is, the more stress your avatar is and less accuracy you have as a result. More someone shoots at you, more stressed you get. It don't matter if they actually hit you, but as they shoot close enough for you to hear bullets fly by your ear, you start being suppressed. Also if you engage in close combat, a LMG doesn't guarantee that you will win. What is more than likely will happen is that most of the time both parties would unload their clip at each other, but with no one getting hit. I thought it was just lag, but it wasn't.
In paint ball, one of the op-for had charged me and I was in a kneeling position. He was no more than 5 meters away from me and closing fast. This guy also had real weapons training seeing that he is from the air force. We unloaded 15 - 20 shots at each other as fast as we could. I only scored one hit and he stitched an outline round me. This all took no more than 3 seconds. As calm as I felt, my body did something else. The danger wasn't real, but it didn't matter.
Of course simulating this kind of response out of a player is near impossible most of the time unless you firmly fix your game in reality which 99% of games don't. Considering that AA, regardless of the fact it is funded by the US Government, is an achievement in realistic warfare in an online environment. If nothing else, it convinced me I never want to fight in a real shooting war.
In RE4, they could have given Leon the ability to shoot while on the move, but that would have produced several gameplay issues and question. While moving would you still have perfect aim or would you make him drift even more. Would you make the zombies move faster to compensate, or would you given them more ranged weapons. Will you conform to some sort of reality or ditch it all together?
None of that matters. The designer was not out to make a standard third person shooter which are really, most of the time FPS's in disguise. He wanted to make a survival horror, which DOOM3 wasn't. The horror was the zombies. The survival was the choice of running or fighting, not both at the same time. He changed the genre. He made it ok to stop and shoot. Like Metroid Prime made an adventure game ok in first person. The graphics may look like standard realistic, the the gameplay is unarguably unique.