I agree that it is possible for a martial artist (not even quite expert) to move in on someone with their gun holstered and disarm him. But, I'll also agree that myself (with limited martial arts training who CAN pull off a couple of disarming moves in a training situation on a mat) will by all means be on the lookout for such moves.
Except the bad guy has the drop on you, he initiates the conflict. You assume you are focussed, and in control, and not trying to recall your grocery list, or some other distraction.
Besides, the defense is quite simple... you simply match the assailant's speed as he approaches you and move backwards. If he moves left, you move right... any marginally trained martial artist knows that much - you either stay out of range or move inside. Hell, even if the assailant is faster it will still work - if I can move half as fast as he, that turns the 12 feet into 18 feet of distance, giving me ample time.
Riiiiiight, you have eyes in the back of your head then? Go look out in the street. See if you can run backwards over six feet from any position in the sidewalk without hitting a wall, lampost, kerb etc. Even on a flat surface, in a dojo, with nothing to trip over, experience says this doesn't work anyway. Do you think we didn't try that?
Oh sure, it all looks pretty when you're on a mat in your gi, a holstered rubber gun, standing exactly 12 feet apart, squared off in a high-noon showdown situation - but in real life circumstances are not so ideal.
Exactly, and your defense is hampered with exactly the same obstacles!
No one is going to come within 12 feet of my wife, kids and I in a parking lot, sidewalk, etc. without me being on the defensive and having my hand on the grips...
Which makes my point nicely, that you are paranoid and think the worst of people, so see and experience the worst. You are scared of people that get within 12feet of you!
Add to the equation these facts:
1) 15 little hollowpoint friends are ready to go - I'm a practiced point shooter and a fast draw.
I thought I was a fast draw and good shot until I couldn't tag a guy just 12 feet away. Try it, don't rely on what you percieve your skill to be, go test it.
2) My pistol is concealed, so he will not even know that he's going to have to disarm it from me. It's not like I'm going to square off with him and warn him that I'm about to draw.
In this scenario he is initiating the conflict and may be expecting you to reach. Whether it's for a gun or knife, you are telling him where it is by reaching, and removing one of your natural grappling weapons, your hand, from the melee, giving your assailant the edge. Practice it, don't talk from under yout hat.
3) Criminals typically do not go after the guy wearing the pistol on his belt. They go after the easy victim, just like in the wild... the lioness will go after the weakest or slowest of the herd, not the big bull.
Kleck's gun defense stats imply that people who own guns are invloved in attempted crimes more often than non gun owners. So either he's wrong, or you are!
4) The majority of people who have the perseverence and dedication to excel in martial arts training to the point in which you speak are more likely to have done other successful things with their lives. They are not the typical criminal element.
I agree here, but that was rather a tangent, and this point has been extrapolated a little too far. My response was to SoLiDUS, who said;
"Any moderately-trained and conditioned weapon wielder owns your supposedly superior male ballet dancers."
Which is just not true in the majority of urban situations. I re-iterate, for your gun to be any use you have to pre-judge peoples intentions, and that make you paranoid.