You can’t miss fast enough. In this case, an armed security guard (the one who didn’t initially scarpered) took out a bad guy with a head shot and then . . . also took off. From his vantage point, aimed fire could have ended this Nigerian bank robbery (no emails exchanged in making this picture).
It’s a simple point made many times in many ways but no less important for it: spray and pray isn’t an ideal self-defense strategy. Unless, of course, you’re using it to cover a hasty retreat. And maybe not even then.
As for point-shooting — rather than using your sights — that can work. But it’s always best to use your sights and squeeze the trigger. Preferably behind cover or concealment, but whatever.
How do you not freak the f out and aim during a life or death fight? Regular practice helps. Force-on-force training is even better. It helps inoculate you to stress and gives you a good idea of your limitations. Which are bad enough with your sights, and a lot lower without.