The might still have guns, but even crooks would be less likely to use them because they're less likely to encounter someone else with a gun, making them less l

The might still have guns, but even crooks would be less likely to use them because they're less likely to encounter someone else with a gun, making them less likely to have to worry about the first mover advantage in that situation. For robberies they probably don't even need one, just a sufficiently realistic replica.