Yes, the ordinary Joe needs a firearm. I live in small town America, we don't have cable tv, there are areas that don't have cell phone coverage. If you call 911 and the deputy on duty is at the other end of the county it can easily take 10 minutes for him to arrive at my house even with lights and siren. If I am off in a remote pasture, in the woods, riding a horse, camping, on a dirt road, and the cell phone works, it may take hours to find me.
It's not just people that can pose a threat, either. My neighbor was attacked by a rabid fox a couple of years ago. He jumped in the back of his truck, but the fox kept after him. He had to shoot the fox.
Where I live, you have yourself and your neighbors, that's it, and that's the way I like it.
As to the idea that "no gun at all can make an overall, safer community", do you have any evidence of this?
As you may guess from my earlier comments, everyone in my neighborhood has firearms. Its part of life in rural America. I have never heard of an "accidental shooting" or injury in my neighborhood. People know how to use them and handle them properly.
Florida has a very liberal policy regarding citizens carrying a concealed weapon. Statistics from the Florida Department of Law Enforcement show that since the CCW law was enacted (1987), crime has dropped across the state and in major cities (Tampa, Miami, Jacksonville). The total crime rate in Florida in 2008 was 4.7%, the total violent crime rate was 0.67%. The annual crime rate from 1971-2008 is provided at the bottom as an attachment.
From 1987 through 2008, Florida has issued a total of 1,593,602 Concealed Carry Weapon (CCW) Permits. Of these permits, 5,035 were revoked for various reasons (but 572 reinstated), 167 for committing a crime with a firearm. As a percentage, 0.28% of all permits have been revoked, 0.0105% of all permits were revoked for a firearm related activity. In fact, the data shows that the CCW community in Florida has the lowest crime rate of any group in Florida. It is so low, that the state legislature is considering not even contiuing to collect the data any longer.