For a defensive weapon, having the ability to make accurate shots in a less-than-ideal stance/without having your firearm in the ideal firing position, is an incredible aid. I thought that the laser sights were a gimmick.....until I was able to plant a whole mag within .75" out of a 1911 at 15 yards with my weak hand, shooting with the gun held low towards my hip.
If you think that in a situation you'll be able to take up a perfect stance, etc....good luck with that. I, for one, with any gun on which I rely for my own safety, prefer to have every possible disadvantage mitigated or removed, in the hopes that I'm the one still "alive and well" after an incident......and that doesn't necessitate thinking that I'll have the time to get a correct sight picture at X-o'clock, or at a bizarre angle, or.....etc.