So how is that different from saying "Arrington just speaks at conferences and writes blog posts. Why do people hate him?"
Speaking and writing as a journalist is what Michael Arrington does. That's a very specific type of speech -- so specific in fact that it's actually explicitly protected by the U.S. Constitution. There is simply no relationship whatsoever between an article Michael writes and, for example, a President's order to bomb another country, except that the two are in some way shape or form molded out of words.
It is also true that not all speech is equally tolerable, in both the moral and legal sense. The Supreme Court ruled long ago, for example, that yelling "Fire!" in a crowded theater is not an instance of protected speech.