They probably walk around unarmed because it is against the law in their jurisdiction, they have families, a mortgage, car payments, insurance, and six-figure employment that will vanish in an instant with a felony conviction. That’s my guess.
If you can’t walk your dog without fear of getting shot and you can’t be armed to defend yourself, it is time to find any way you can to leave that neighborhood.
Philadelphia (despite the the attitude of it’s city government) is still in Pennsylvania, a shall-issue CCW state.
Not so in Pennsylvania. The Castle Law in effect even protects a lawful self defensive shooter from civil legal suits.