This is probably the worst immersion thread ever.
I'm sorry Konachibi but most of your argument has little to do with the definition or the understanding of immersion.
No game can just be judged as a whole. That's why when people try to give a game a rating they often break it down into things like: Sound, graphics, gameplay, etc.
Now as for immersion in a game and what contributes to it... Almost every aspect that developers create for a game IS meant to add immersion to the game. That does not mean it is successful, and sometimes developers will sacrifice immersion for convience with the user interface. For example, lets look at those categories that I mentioned people rate games on. Sound, music and sound effects add to the idea that you are inside the world, adding to immersion. Graphics, aesthetics and effects help a player understand and feel like they are a part of a real fantasy world. Gameplay, things like combat and gear customization is made so that you can feel like you are a clever and powerful warrior and you can be this in your own style and preferences, like you would be able to if you actually lived in that world.
So I've picked three INDIVIDUAL things that contribute to a game and they all have to do with immersion. So it may be true that the entire game is made up of things to increase immersion (which is why immersion is so important) but that does not mean that certain aspects of the game can't be fixed to increase or decrease the effect of the immersion. Simply because you say THE ENTIRE GAME IS THE ENTIRE GAME AND WE MUST LOOK AT IT AS A WHOLE, does not change that the game is made up of numerous aspects to make it a whole.