The concept of first Person shooters is not a complicated one. The target audience is not people like us who want to delve into the world of a game and enjoy every aspect of it. The target audience is the Person who just wants to come home and have a little fun. The reason why we Zelda fans have a tendency to hate FPS fans is because we are opposite. Zelda fans look at every aspect of a game: how much fun it is, how it has evolved from its predecessor, how the story makes or doesn't make sense, etc. The major FPS mentality is, "will I have fun?" Not everyone wants to think so much, or even at all, when they play a video-game, thus all they need is a game that lets them kill each other.
I, myself, don't like FPS's that seem too real. CoD and MW are just not my type of things (because I don't like any realistic games, sports and racing games included). But when you put in impossible things like crazy guns (halo) and skiing tactics (tribes) it is incredibly enjoyable to me because I'm still leaving reality.