Want to be a gun slinger, join ISPC, IDPA or what not.
Tunnel vision at it's finest.

All shooting sports will get you familiar with you handgun, and that alone is good. Learning to clear a malfunction, drawing, shooting around a barricade, reloading the handgun on the clock and under pressure. All of this makes one familiar with their handgun and can be a big benefit when under stress and having to deal with a real threat. Maybe, and just maybe the manipulation of your handgun under a life and death situation will be just second nature because of familiarization and then you can focus on the other factors of the situation you are now facing.
A fact, no, but maybe the small edge of being familiar with your handgun from shooting it in games can be a BIG factor in you surviving.