The police exist to serve and protect society (or the State), not a particular individual. This is a point often made by those who argue in favor of such things as "concealed carry" and against any rational control of firearms.

Query: Why doesn't any want to control weapons other than firearms? Machetes, say, or police batons. Both are easily available in stores and over the Web and both can cause considerable -- and quick -- destruction to others when used correctly.