That’s a sharp, solid, reality-enabled question. The study indeed did not control for urban/rural effects, though a small slice of that was picked up in the state by state variable (meaning, in statistical parlance, there was a dummy for Alaska, a dummy for New Jersey, etc.). Moreover, I find your hypothesis highly plausible.
You also extracted the substance out of my over-loaded rhetoric. Again, kudos. I had a fair amount of mockery in my posts, but I think it’s justified: note how few of the references here to the 2nd amendment even mentioned “Well regulated militia”, which is part of the same damn sentence. Ignoring something as obvious as that undermines your credibility and makes me question the acuity of your perceptions.
That said, a portion of the US has a pronounced gun culture (which I was mocking). But I believe it should be accommodated in some way: IMHO if you are a responsible citizen and are willing to take out liability insurance against theft or misuse, I’d permit you to own an Uzi, M-16, or automatic weapon. Heck, I’d even grant militias the right to train with bazookas, if they were indeed “Well regulated”. IIRC, a poster in this thread ran a militia for a while and I say, in all seriousness, “Why not?” Judging from his website, his weekend training looked interesting.
But I can only laugh at those who think firearm ownership is some sort of profound human right, extending to all manner of criminal or maniac.
I’m sympathetic to those who seek to expand their skill set. Part of being a capable human, I say.
But another consideration is the degree to which a gun in the home is a risk reducer or risk intensifier. I’ve studied the matter online in the past and found the studies insufficiently strong to draw a conclusion. (On average, guns appear to be an intensifier, but if you want to advise individuals you need to consider a few covariates.) Which was frustrating, frankly. I haven’t cracked open any books though, largely because I don’t care enough.