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If people were rational about their need for guns, that might work. Unfortunately, one of the biggest fundamental drivers of rabid pro-gun stances -- the people that knock on doors and man phones and donate according to the NRA's ratings and turn themselves into single-issue voters and define themselves by rabid opposition to any gun control whatsoever -- is completely irrational, and it needs a bit of explaining:
Guns and direct causation combine to let powerless people fantasize about being acknowledged.
The link between direct causation and conservatism has been discussed here before, but this also underlies both the
religious aspects of gun ownership and the
persistent references to "reissuing your man card" and other nonsense in gun ads. There's also a weird commonality, at least in the gun owners I talk to and the Youtube channels I go look at, that seems to match up with two trends noted in Angela Stroud's "Good Guys with Guns" (ISBN-13: 978-1469627892). I think it's best encapsulated in this quote from a Gun Gripes video: "When you have a gun, they have to negotiate with you." (Said of their ability to carry guns into a bank, no less.) Similar sentiment is behind gun owners describing their apocalypse plans; it's a given in their minds that, since they have a gun, everyone else is very interested in their opinions of how useful other people might be to their survival and how they almost without fail describe defensive gun use as "taking control of the situation."
See the commonality? They're not talking about using guns; for all the bluster about how "you should never use a gun to threaten people" the critical thing in their minds is to have a gun and the concomitant capacity to use it. Nor is there all that much discussion, at least without prompting, of de-escalating the situation once the gun is out; control itself is what matters to them.
Now, to people who think systemically, one guy with a gun is totally irrelevant to the broader shifts in government control -- but under direct causation, that same guy can hold off the people coming to repossess his car or eminent domain his house away, and those people are the problem rather than the apparatus behind them. Guns can't add to your bank account, but they can make the bank personnel talk to you. They can't reduce crime, but they can frighten a criminal.
Most importantly, guns can't change the fact that the coastal elites don't give a shit about flyover country. They can't make coal useful again or cure opioid addiction or bring us back to a time when a high school diploma would let you pay for a house and 2.3 kids and LGBT people officially didn't exist and nobody needed to think about anything and toxic masculinity was sexy rather than sad.
But, if they're holding a gun and the rich smart educated liberal who's stolen their future and mocked their culture and corrupted their children with silicon and hair dye is looking down the barrel, in that moment they aren't a joke anymore, and that fantasy is going to keep them clinging to their guns forever.