So, the question seems to be, "why do folks own guns, but not carry them." Where I live, there are probably more guns than people per square mile. Still, folks who carry are in the minority. For many, there seems to be the mentality that "I've got a gun, so I'll be safe." Even if the gun is sitting at home in a desk drawer. It's sort of a safety-blanket mentality, that just having a gun at all will somehow make them safer. Many folks aren't even trained.
Of course, the gun at home in the desk drawer won't help if a meth-head tries to shoot me so they can "borrow" a car with clean plates (as happened here a couple of weeks back), but most folks just don't think that far ahead. When the Fulton County courthouse shootings happened a couple of months back, people told me that if they ran across the guy, they'd be ready because they had guns. I'd ask what they were carrying, and I'd get an odd look, followed by, "well, I've got [insert gun] at home." Tons of guns in Georgia, yet this man carjacked numerous people, none of whom had their guns with them at the time.