It's good to be reasonably prepared but not to obsess over something that is far, far less likely to happen than being struck by a car while crossing a street. Virtually no sane person puts much thought into the potential hazards of crossing a street. Instead, they exercise reasonable care when they step into the street.

The well meaning and others can go on lengthy, needless diatribes about gun seizures, self defense, bad neighborhoods, etc., but every situation is different and laws (as well as customary practices) vary from one jurisdiction to another. Maybe it's best to relax and enjoy life as it is.