He said using SA under stress is likely to result in accidental discharge possibly hitting an inniocent person.
This is a common view among many who have had law enforcement experience. And they are right, for them. But not as right, for you, or I. Police officers hold people at gun point, more often than they actually have to shoot them. Holding someone (who might possibly move suddenly, etc.) at gun point with a cocked revolver is very likely to result in AD, and multiplied over the number of officers and times it happens is a very poor policy for and Dept. to endorse or teach. Also the people they are holding at gunpoint are often in public where other (innocent) people are near.
Personal defense, particularly in the home is not the same situation.
And while I do agree that one can focus on teaching only DA shooting, particularly for personal defense, its not the only thing we do with our guns.
He also says a high percentage of personal defense situations, one does not have time to cock the hammer.
I also hear this one a lot. And I have to disagree, slightly. If you have time to draw the gun, you have time to cock the hammer. What you might not have is time to
aim well, and certainly not have the time to do it in the way you are used to shooting casually.
And that's where the trouble comes in. Shooting SA "teaches" you to do things slowly and precisely. Very good for everything
except close range personal defense. Its not the physical time needed to cock the gun that puts you at risk, its the other factors one is used to doing when shooting SA that are dangerous in that situation.
Note that the world record draw and fire times (fast draw) have been dominated by SA revolvers for generations. Its not just the cocking of the hammer that slows you down and puts you at greater risk in a defensive shooting, but cocking the hammer is what many people focus on and say is the problem.