Assailants rarely stand still and announce themselves as a “threat.”
Check this out:

In the September issue of Townhall Magazine, where this article originally appeared,’s Bob Owens asks if your firearms training is realistic.

I’ve been to a number of different self-defense courses in the past 20 years, almost all of them focused on drawing and shooting at a stationary paper target at a known distance on a static firing line after the lead instructor has shouted “threat!”

I’m now supremely confident that if I am ever attacked by a stationary paper target, I will survive.