Absolutely, I was taught this in my self-defense shooting class. The question of kill or not kill doesn't enter into it at all. We were trained to neutralize the threat, full stop. The effect on the future health of that threat doesn't enter into it.
And this makes sense when you understand that gunfights don't happen the way you see on TV. There, when someone is hit with a bullet they fall down and stop being a threat. This is not how the world works. In the real world, unless their circulatory system or nervous system is taken offline, they will continue to be a threat. Even if they've been hit through the aorta or femoral artery or something that is likely to be fatal, it'll take a minute or two at least for the effect to occur, and in the meantime, they're going to keep trying to kill you.