My guess is that many if not most denizens of the blue cities are not capable of finding their way out of the blue cities.
“There are only nine meals between mankind and anarchy.”- Alfred Henry Lewis (1906).
(Maybe 1 or 2 missed meals in the Fudge Rounds era before they turn to cannibalism.)
Unfortunately Big City crime out here in the sticks has proving they can find their way out here. I’m over an hour from Minneapolis and our sheriff has busted more than a few felony crimes and a murder committed by people from Minneapolis. It doesn’t help that a major four-lane US highway goes straight up the middle of our county and on one end is almost Minneapolis metro area and the other end of the county is a large native American reservation complete with its own issues and crime.