Why?

Blogs are great, blah blah blah. Why, when there is an article about blogs is it always about political blogs? Why is it that when the democratizing nature of blogs is mentioned it is always political blogs? Why does the press make it seem like there are political blogs and then everything else? And why is the everything else often implied to be drivel? Why is news about blogs that are not political confined to the book pages, the tech pages, etc? Why am I surprised?