I get way more Steelers nation talk than I would like having a very good friend who is a die-hard Steelers fan... so I, in no way, underestimate the defense.
I think the bigger issue is, with the exception of New England, which everyone is going to claim snow on, no opposing defense has really shut us down. We scored 20+ points, I believe, all but twice this year (7 against NE in the snow and 17 against the Vikings at home). We put up 32 on the Eagles defense, which i"ll grant, isn't near as good as the Steelers defense, but is impressive in its own right. Even back east in a horrible Thanksgiving game we put up 20 on the Eagles in Philly.
I think the general thought, and my hope is a die-hard Cardinals fan, is that we can put up 20-24 points on the Steelers, even with their great defense. If you want to look at a game to get tips to keep that from happening, look to Minnesota. (my tip to the Cardinals on that is don't go down by 14 right away).
The real question is, can the Cardinals defense limit the Steelers to 19-23 points. Our defense is a middle ranked defense (with some abnormal games working against us -- hopefully abnormal games). The Steelers offense is vulnerable however, especially on the o-line and we have shut down much better run games.
I think this whole game comes down to... can the Cardinals defense limit the Steelers offense. I'm sure we get our points.. we won't put up 32 and probably not 24.. but I thinkw e can get the 21 we need to win... can we stop the Steelers from doing the same?
Thats the question in my mind.
I have to defend my defense. I think you are attempting to gloss over just how good our defense is. We beat a 37 year old NFL record for holding teams to under 300 total yards of offense in 14 straight games. We faced 5 of the top 10 offenses in the league during that stretch. We only allowed an absolutely astounding 156 ypg passing. The Eagles defense better than ours? You cannot be serious lol.