One other factor in this: the Steelers are an old NFL team with a lot of history and playoff appearances in their time. The media is going to focus on them as much as possible, since they're the most recognizable team from the two by a longshot. The media is dumb.
Well no shit they're going to focus on the Steelers. You know how if you try to name all the teams in the NFL from memory, you always go "there. got 'em all. no wait, one short. Shit, what is it? AGH THERE'S ONE MORE WHICH FUCKING TEAM DID I FORGET"? That team is the Seahawks