Common Courtesy and the TV Commercial

There is a Liberty Mutual commercial that features people performing random acts of kindness, like pulling someone back from dashing out into traffic or allowing someone to take a parking space. Of course, doing these things one would hope be second nature and perhaps that is the point of the commercial. The question is, why isn't it? Have we become, as a nation, so self centered that simple good manners and common courtesy is as rare as jade? I'd like to think not- even if reality TV aspires to convince us that if Chivalry is not dead, it's barely hanging on...