In his first sentence, he's making the Charles Barkley argument: I am not a role model. I think that both Sir Charles and Atrios are mistaken. None of us--even the famous and influential--get to define what we mean to others, or how others view our roles. Just as Barkley's denial that he was a role model didn't make him any less of one, so Atrios's protest that his role in the universe isn't what others perceive it to be doesn't make it true.
The knock on Charles Barkley - for those who were interested in knocking - was that he wasn't being a role-model to KIDS.