Can't argue with any of the above I would say it's 100% right on, unfortunately it's very rarely understood, and that is a problem. A person can get used to anything, but whether you feel you are effected or not is irrelevant, if you're human your senses are going to be on edge, but it's the practice that will make the difference.
It's why run of the mill jack asses who fire at cops for example, almost always always lose. Some stupid kid or asshole with a gun isn't really going to be a match for a cop with training.
However put the cops up against say a former marine, or someone who has had serious military training, the tables can turn. I point this out to illustrate the points you made.
Over a 22, I almost take the pokey stick LOL, growing up every knuckle headed gang banger or want to be either had a 9mm or a .22, typically because both are cheap, easier to steal.
The problem is most times if someone survives being shot and that doesn't happen unless it was like me and they missed, which happens even more often. If someone shoots as intended with a gun the victims is going to die.
However any of those I ever seen survive have been .22 typically with it stuck in them.
Cheap, typically police issue, with a nice holster something leather and comfortable, this works.