Pocket carry is a major advantage, and double stack mags are not. By the time you miss that much, you will have a bullet hole in you, unless you are very lucky. A single stack lies much more discretely in a pocket than a double stack.
By having your hand on your gun (still in your pocket) whenever you perceive a possible threat, you speed up your draw by 1/4-3/4 second (depending upon skill level and type of rig and garment). Since anyone can club, stab, or shoot you 4-5 times per second, I consider that time savings to be of vital importance.
Nearly all of the time, the attack stops at the mere "appearance" of your (ready to fire) gun, so speed into action is vital. If you have to actually shoot somebody, the price for staying out of jail and not losing a civil suit is likely to be $50,000. It's much better to just have them see the gun in time to back away.
If you can't solve your problem with 7 rds (and a fast mag change) you probably can't solve it with any pistol, other than if luck saves the day for you.