You’re moving goal posts
Please check out the YouTube reference. Ayoob says we have an ethical responsibility to correct anyone using the “shoot to kill” phrase.
No, none of us should ever shoot to kill someone in self defence. We shoot to stop the threat. Center mass shots are the most reliable defensive shots and are generally favoured over head shots. A Center mass shot that sends a Speer Gold Dot +P (what I’m currently using) through someone else’s left ventricle had a high likelihood of stopping the threat. I suppose it might have significant adverse health effects on the attacker, but it certainly wouldn’t be my intent to kill anyone.