90% of handgun shootings are < 3 feet
Takes 7-15 seconds to bleed out from a direct shot to the heart (i.e. drugged up people are still dangerous after multiple shots to chest). The only instant stop is a 2" band around the head.
15% of handgun shootings are fatal (mostly due to quick medical response these days).
In the one second you have to draw, the bad guy can cover 18 feet from a standstill; have done this drill.
Having spent a fair amount of time in my youth shooting with a BB pistol in my parents garage, I find the above statistic entirely believable. Shooting a pistol accurately is much more difficult than it looks, so I can certainly imagine that in a high stress situation where your own life may be on the line you'll make simple mistakes that cause you to miss..
Most hunters pass this test without much difficulty. Of course, on the range the distance is known (100m, IIRC), and the target moves at a constant and known speed, so one knows how much lead is needed. Still, AFAIU in the wild the results are decent.