They already carry guns, or at least some form of weapon. No one mugs someone without knowing they have overwhelming force. Knowing that the person you're about

They already carry guns, or at least some form of weapon. No one mugs someone without knowing they have overwhelming force. Knowing that the person you're about to rob is likely to have a gun, and is likely to use it against you, makes you consider safer forms of employment. It's not like they only have to steal one car... It has to be regular or it's unsustainable, and if you are regularly getting shot at while trying to carjack... You won't be carjacking for long!