I hope you are right, but that has not been my experience. Here's a story I heard...
A younger guy hired on at a place and became friends with an older man who had already been there a number of years. They both enjoyed guns and believed in carrying for self-defense. The older man carried a Colt Commander and the younger guy always admired it. About 15 years later, the older man retired. As a memento of their time together, the older man gave his Colt to the younger guy; gun, holster and belt. The gun was in the holster and loaded.
Excited, the younger guy went to the range with his newly acquired gun. Since it was already loaded, he figured he'd just shoot that mag. Pointed at the target, pressed the trigger, click, but no bang. It wasn't until that point he decided to check the gun. He could barely get the magazine out. The slide was extremely stiff. The gun wasn't rusty, but had a ton of dirt in it. Once cleaned up it worked fine.
The younger guy came to the conclusion that the gun had not been out of the holster in the 15 or so years he had known the older guy. Apparently, he had just strapped it on every day and never cleaned it or shot it in all that time. Had he ever needed it, it probably wouldn't have worked.
Is the story true? Meh, it doesn't matter. The lesson is the same. The point is, just because someone has been carrying a while doesn't mean they know what they're doing. It doesn't mean they practice. It doesn't mean they're any more "serious" than any other shooter, even a new one. It only means they've been carrying a while.