I do not wonder at all. The answer is very simple. Unarmed people can't fight back. Risk v Reward dictates that criminals minimize their risk by striking where they are likely to face the least resistance.
Yeah, I wonder about that too. Maybe I should drive a zig-zagging route to work tommorrow. [rolleyes]
I often wonder whether we do not rest our hopes too much upon constitutions, upon laws and upon courts. These are false hopes. Liberty lies in the hearts of men and women; when it dies there, no constitution, no law, no court can save it. ~ Learned Hand