Absolutely I agree. I'm just saying that, while it worked, the person who shot him in the leg, if they were indeed aiming at his leg, made a risky gamble. A gamble a trained (even moderatly so) shooter, civilian or cop, are unlikely to make. I'm glad the guy didn't die, and I'm glad the defensive shooter didn't miss and hit anyone else or have his round pass through and hit anyone else or the like.
I just wanted to point out that aiming center mass is safer for all those around, and improves the likelihood you will actually hit the target, and that the target will be stopped. (yes, in many cases lethally so) Police are not trained to "shoot to kill", to my knowledge, but they are trained to minimize risk to everyone besides their target.