Guns are a tool and you get masters with apprentice's which use the tool. Teaching how to use it properly would take time and I dont think insane people really want to learn how to use it first.
Anyway an FPS is so sudorealistic that it doesn't give enough information in the animation on how to use a gun, you don't just take a gun out of a holster an fire away, there's a safety and you have to cock it. Blaming an FPS for a ballistics based massacre is absurd