Are you implying that enough people can't be trusted not to shoot at police with their guns that it justifies an armed response to every call everywhere in the entire country?
The math doesn't say that - the 120 per 100 figure is misleading: obviously everyone doesn't own a gun. About 22% of people report owning a gun. So yes, a high figure, but the chance of someone owning a gun AND currently carrying it brings that number down a bit. I do agree that it's still quite a dangerous situation regardless.
Well then let's run the numbers: which math are you talking about, the number of guns? My question stands, then. After that, where is the line that changes the dynamic "entirely?"