I do not understand this "the proposed solution is either a panacea of don't bother" attitude to major problems in society. The whole point of guns is to make it extremely easy and simple to apply lethal force instantly from a distance onto multiple targets and without any chance of defense. Don't you think that taking that away from practically all attackers improves everyone's chances of surviving an attack?
Gun ownership, self defense, and most importantly, the maintenance of real armed power in the population at large discourages a worse outcome, than the loss of any particular life.
Like, I imagine that my country would the greenest & cleanest in the world, if we would get to disregard all factory and car emissions, from our stats.
And I'd be rightly downvoted for making that claim.