And then there are the people who think the poor soul was depressed and had nothing to live for, that he was still bemoaning the fact that his ancestors were slaves, that he was a victim of descrimination, has nothing to live for, etc. These are the fools that become victims.
The ones who prepare tactical plans in advance are the ones who survive. They train cops to think, "What would I do if placed in this particular situation". When you have the program in your head it is very likely you will follow it.
But the guy who thinks ahead and doesn't place himself/herself in jeopardy is the one who will most likely never have to use deadly force.