You're missing parent's point. Parent is merely pointing out that the right exists in a state of limbo because some arbitrary line is being drawn in our national debates that determines the degree of technological advancement that the right permits.

I think the parent commenter is also living in a bit of a bubble and thinking that all of America lives in a monoculture. There are still points in this country that are patrolled by a single sheriff and a couple of deputies and can be more than 10 minutes out. This doesn't mean they need an arsenal at their disposal, but supposing that they they need NO guns for farm work, hunting or protection from animals or people is either disingenuous or unimaginative.