Oh I don't know.
The fact that everybody is so in love with FPS wuss games.
If you want to shoot a fu***** gun, then go shoot a fu***** gun!!
"Wuss"? So I guess flailing around your living room playing one of the dozen or so golf or bowling games on the Wii makes you a real hardass, right?
As unluckyseventeen already pointed out, the biggest appeal to most people who play video games is to be able to have an experience you can't have anywhere else. If I wanted to just "shoot a gun", I could totally do that. But if I wanted to, let's say, team up with a squad of friends and take on another group of similarly skilled individuals using the latest in military technology in an all-or-nothing battle to the death... well, that would involve purchasing a large plot of land, possibly even my own island - substantially more money than a typical trip to a firing range. And seeing as I'm not a ****ing Bond villain, I guess I'll just have to settle for Call of Duty.
Meanwhile if I want to go bowling... I can get in my car and drive to Sandy Lanes.
The argument you're using is one I've heard a thousand times, although it's far more grandiose - typically phrased like "If you want to shoot people, go join the army!"
Games allow you to do things that simply are not a viable option in your everyday life. Engage in warfare, fly a jet plane, be a professional athlete, pick up a hooker and then run her down with your car after she's done and take your money back...
I understand you don't like the FPS genre, but that doesn't mean they "suck". Or that they're stupid or wussy or whatever other elementary school insults you want to throw at them.
You've demonstrated a complete lack of understanding for the subject at hand, and I can say with much confidence that I probably know more about the video game industry than you've ever forgotten.
Suddenly this discussion seems pointless. Here's a comic to sum it all up. Guess which guy you are.