I've drawn on men several times, they decided to not make me shoot them. There was nothing but the response I'd TRAINED myself to make. The gun seemed to "grow" out of my wrist and into my hand, in fact.
I know a lot of guys who've eaten a lot of dirt "in combat" and sprayed a lot of ammo into the bush, and NEVER saw a live enemy.
I've also drawn on attacking dogs a few times, the only time I've HAD to fire, I used a silenced Ruger .22 to brain one, right at my feet. Having been"in combat" doesn't necessarily mean crap. I've seen and heard HORRIBLY poor advice offered by combat vets. Just look at Cooper claiming that a short ranged bolt action is useful for resisting tyrants.
Look at the fools claiming that a pos like an AK is a better gun than an AR. or claiming that 223 sp's just BOUNCE OFF men at 300m,etc.