I have a hard time believing that more people who live in Cincinnati aren't armed. It is a beautiful city in many ways, but it is ranked 98th out of 100 of the most dangerous cities with populations of 25,000 or more according to NeighborhoodScout, which states it gains its statistics from crimes reported to the FBI. This makes Cincinnati way more dangerous on a per capita basis than L.A.
My own large midwestern city has also been plagued by serious crimes thanks to gang activity and the drug trade. They aren't just killing each other, they are killing completely innocent people with no connection to them. Nearly everyone I know, and these are middle aged and older white collar professionals who live in upper middle class suburban neighborhoods owns at least one gun and many also have permits to carry. We've had shoot-outs in stores between armed citizens and criminals who are trying to victimize others and numerous lives have been saved thanks to their quick reactions. It is a little like living in the wild west here and it takes the police 20 minutes or more to respond, so if you don't want to become a victim, you learn how to be safe with a gun, you take classes and you are prepared.