Fully agree - as I stated standard hunting rules - know your target - what is behind/around etc. Finger off until you intend to actually discharge the round. You do not shoot at a deer in the woods in Alabama with a 30-30 at 150 yards, you have to know yourself, you weapon and your target - I also agree that anyone not trained/experienced in those "10 seconds" should get down, but if I am the last resort between the bad guy and some quantity of death I will take my chance at that time, at worst a few rounds in the ceiling or floor may cause him to stop, think or run when he finds out its not a "gun free zone" and easy targets.
While I do not equate it to having someone shoot at me I have had some run ins with wild hogs that have caused me to have to climb trees quickly and put several rounds into them till they decide to leave or drop - which probably equates more to a nutter with a knife or bat.
I think all too often even with police and the public at large - the suppression fire/pull the trigger till its empty mentality happens in those 10 seconds which is where you get innocents by the good guys, as well as some of the stats of 2-3 rounds out of 10-15 hit the target. Same thing for bump stocks ( which are worthless in my opinion ) or full auto - while those may or may not have a place on the battlefield - spray and pray is not a good way to shoot.
I am not a cowboy with a gun, and I realize that range time when it comes to combat / active shooter gives little to no advantage, but I do have the ability that if I do have to die at the hands of a nutter - I will at least attempt to make it count for something.