This, exactly. If you have read my posts, Mini, you'll recall I stated that my mother had a gun for protection in the house, not out of fear, but out of common sense. It was common when/where she grew up. My parents also had hunting rifles in the house. Again - they didn't "carry" guns. They had them in the house, secured. I don't ever remember my parents even getting out a gun other than for hunting purposes during hunting season. So I hardly think fear was a huge motivator for them.
I cannot provide logistical reasons for the other 311,591,916 people in the country... I imagine some have them for strictly hunting, some for fear... but I think you don't do yourself any favours by assuming it's all down to "fear." My sister works in law enforcement in the states and has guns in her house - her duty gun, as well as a secondary handgun. Her choice - she is a responsible gun owner and keeps them secured. She also carries a gun, concealed, due to her work (with a permit obviously).
I have a friend that carried a gun (concealed with permit) who worked with me in law enforcement for years. She carried it out of fear - fear because her police ex-husband had threatened to kill her and was routinely stalking her. I wasn't keen on her carrying it, as she was highly emotional and under extreme pressure, but again .. her choice.
Not all Americans are driving around in pickups with gun racks on them or sitting on their porch at night, cleaning their rifles. (although I do know a few
)
Personally, I think the major issue is not guns, but gun safety/control.