Dude: 2 reasons come to mind.
All dispensaries have armed security guards hanging around. I know 2 guards, each named "Alex", and they are both really cool toward nice folk like me and really dangerous to thugs.
All the criminals are in the bar anyway: getting drunk and then robbing/shooting/fighting amongst themselves/ODing on Toxic Alcohol/and driving home drunk. Just do a real study of crime near bars and crime near dispensaries to see what kind of people frequent those areas .... and their temperament types.