Yea but having a total ban on gun sales is different from various restrictions as the latter still results in the possibility that even though guns may be hard to acquire, someone is STILL going to be packing, there isn’t a law against it like before.
In general, just the threat of guns seems to be pretty effective most of the time.
Yes, but there is now enough evidence that citizens with guns lower crime rates. This has been proved by CCW laws in now over 40 states.
I do agree with your premise that the threat the victim will shoot back, is usually enough to discourage. If people don’t think it works, ask them to place a sign on their lawns “no guns in this house”.