Yet, I've never been shot ,or lectured , by a CO. And I've been approached by one, several times, while holding a loaded shotgun or rifle. By the same token, I've been ordered out of my vehicle, and disarmed, by a city police officer, because he saw a pink piece of paper next to my driver's license. Seems like a training, or mind set kind of thing.
Lots of times it's an experience thing. When I was at the academy, they taught disarming everybody with a good saying "You should be the only one with access to a weapon, during non-consensual encounters," and though not stated explicitly we all took it to mean "disarm everybody." When you hit the road alone, you rely hard on that training, because you're at first uncomfortable, and not fully confident in you abilities. As time goes on, you get the understanding that vast majority of legal carriers are good guys. I don't know when I stopped disarming people, but it was fairly quickly after I made that realization.... but, I will freely admit, if my spidey sense went off, and person was carrying, I would disarm them.