Because it makes more sense
"Makes more sense" is subjective, and is a sentiment generally only espoused by those who are disarmed, and their hypocritical spokes people.
If firearm ownership translated into a safer society, we'd have the safest society on the planet.
Theres more to life than society, particularly for rural folks.
Yet while the US might not be Syria or even parts of Mexico, our crime rates and especially our gun crime rates are much higher than places like Canada, Europe, and Japan, where firearm ownership is extremely limited.
Ahh yes, japan. Where they can beat confessions out of you. We aren't any of those places you mention.
Beyond that, there are also certain practical considerations. There are too many people with no interest in arming themselves to ever fulfill that fantasy of armed criminals getting shot on sight. Even many people who have carry permits and who carry on a regular basis are less interested in being the good guy with a gun and more in defending themselves if they're confronted directly. What if they hear shooting around the corner? They won't confront the shooter, they'll head the other way.
And?
Paris and Oslo (Anders Breivik) are a good example of how even tough gun laws do not keep everyone perfectly safe from crime, but nevertheless, in general you are much less likely to get shot and killed in France or Norway than in the US.
When disarmed you are at 100 percent disadvantage 100 percent of the time, to someone who is armed. If people want to make that decision for themselves, I'm fine with that, just as I'm equally fine with people deciding to be armed.
Despite our much higher rate of firearm ownership. Or perhaps exactly because our much higher rate of gun ownership.
Correlation is not causation.