

The issue I see with the logic that “Everyone should have the right to carry a gun everywhere, until their negligence causes harm” is the massive consequence of someone messing up with a gun.
Guns are so extremely lethal that when accidents happen (they will eventually happen), it is likely to result in death or disability. It seems pretty clear to me that society overall is safer for everyone the fewer guns there are around. It doesn’t really matter if the person that shot me due to negligence loses their license, I’ve already been shot, and they shouldn’t have had a gun in the first place.
Look, I’ve been in the army, I know firearm safety, and I strongly disagree. People can slip and fall, or inexplicably fumble and drop stuff. People with no history of it can suddenly have seizures or heart failure that causes them to seize up or collapse. None of these are common, but all can occur. If you happen to be carrying a loaded firearm when it happens, that firearm can go off. Even if you have the safety in place. Shit can malfunction.
Regardless, if I get shot, the question of whether it was intentional, an accident, or due to negligence is really a secondary matter. The primary issue is that I just got shot, and that can have irreversible consequences.
My point is that if I happen to get shot, I really don’t care how statistically unlikely it was to happen in the way it did. The most effective way to prevent firearm injuries/deaths is to keep firearms away from people that don’t strictly need them.