Randy Moss is an ass. That doesn't mean he's the only bellybutton out there. At least Randy can play.
John Madden is an ass. That doesn't mean he's the only bellybutton out there. At least John can call a game, and see what's going on, on the field (and on the tailgate grills), without sounding like a rehash of the top "story lines" from some NYC tabloid.
Joe Buck is just an ass. Gee, remember the Mike Piazza-Roger Clemens non-incident? Joe Buck's singlehandedly responsible for bring that crap up, over and over again. He has no capability that I've seen to call a game, so he fills the time with gossip, moral outrage, and pandering. It's announcers like him who give sports stars the opportunity and the motivation to behave like complete asses.