Your suggestion is at one extreme, and not recommended. Emptying a magazine is the other extreme and may not be necessary. The right answer is probably in the middle, but it’s situation dependent and can’t be judged until you face the threat.
I will somewhat agree with some constraint being applied. When police switched from revolvers to semiautomatics like Glocks, the average police shooting round could went from 5-6 to 15-17. That may reflect threat but seems like it may also reflect a training mentality.
Police are trained to keep shooting, rapid fire, until the perp goes down and is visibly no longer a threat.
The first shot may well have been fatal (eventually), but that doesn't matter. The cop will keep shooting as long as the perp is still standing, and a trained person can empty a mag in a few seconds.
I apologize to you both; I should have included a sarcasm tag.
I was attempting to point out the absurdity of the "shoot to incapacitate" concept.
I also forgot that some Liberals (not you, of course!) would undoubtedly embrace my suggestion - which is strongly reminiscent of Barney Fife's "I'm warning you! I am now taking my one bullet out of my breast pocket, and putting it into my revolver!"
Regards,