In San Francisco, if they were coming to a call where it was reported that a person had a gun and was threatening others they would definitely come prepared. I do not doubt that the situation would have been much the same in almost any city.In San Francisco, at least, they're taught that they should never draw their weapons unless they fear for their own lives or the lives of others and should never fire their weapons unless they're intending to kill.
Handguns have one and only one purpose: to kill human beings.