it's just that nobody has heard of it actually happening.
When I took my mandatory CCW Instructor's orientation, back when they required it (I had to drive to Phoenix), the DPS folks used a real world example of an arrest they knew of.
A DPS cop had to chase down a speeder in a 2-seater sports car. He was pissed when he finally pulled the guy over. A gun was tucked between the seats. It belonged to the driver who had a CCW permit. The passenger did not have a CCW permit and was arrested for carrying concealed without a permit.
When we were pursuing Constitutional Carry, the resistance we got from law enforcement was NOT because they like permits for the law-abiding. We learned (from them) that it WAS because the CCW laws made for easy arrests. A gun in a car full of supicious looking folks. Gun was not visible from the outside of the car, but technically accessible by everyone in the car. No real detective work needed, just invoke AZ v. Adams or AZ v. Moermann and you have an instant arrest, and in law enforcment's mind a bigger crime had been prevented.
Fred