Do you, reader, want to have to confront a bunch of scary people for a $? Oh, you think having a gun makes it a bit less scary?
Almost no one wants to confront dangerous people day in and day out. Once in a while to flex the hero complex, maybe. But a few times of that will cure you of any particular desire to seek it out.
The people that want to do that are one in a thousand types. Basically criminals themselves, just on the right side of the law who use the 'criminal' mentality for good. Most police are not that.
They want to do a job, collect a paycheck, and do it in an easy way. Like how I like to drive to work rather than do a handstand and walk 5 miles on my hands and wrists. They get little to nothing for making their job harder.
The people with the most motivation to stop the criminal is the victim themselves. You are pretty much on your own. The state won't be coming to save you.