The Steelers didn't play with a sense of urgency last year? Really?? So they approached every game like it wasn't all that important?

Teams don't lose because of lack of desire? Really? So successful teams just go through the motions without their heart fully in it? Wow.
You miss the point.
Yes, teams dont lose for lack of desire. I am not saying teams without desire win, I just think everybody wants to win. I believe it is extremely rare that any difference in desire is the difference in winning and losing.

In 95 Cowboys are SB champs. Steelers have come close so often. You cannot tell me the Steelers dont want it more. Execution won that game plain and simple.

BTW, I do not equate a "sense of urgency" with panic, or screaming at players, or anything like that. I do equate it with a willingness to step in and address what needs to be addressed. I do equate it with a willingness to step up and do what needs to be done to win.
A "sense of ugency" is a state of mind that manifests itself in a persons bearing.

House is on fire, everybody sleeping I wake up first. I will be in a state of urgency like you have never seen in a game.

I want a calm team, even under adversity.

Joe Montana says "hey look there is John Candy" while attemping a comeback in the SB. Is he complacent? No. neither is he "just going through the motions".

If I look at Montana in those situations there is nothing that looks "urgent".

That same attitude "looks" like complacency if you happen to lose.

This is a team that is sloppy,
Execution, not urgency

and doesn't exhibit the desire to get it done. That shows in everything from fourth-quarter defensive collapses to kick return TDs allowed to continual poor play-calling.
Execution again, nothing nessearily to do with desire.

Again, three words: Super Bowl Hangover.
SB hangover? Ummm we had a HUGE 4th quarter defensive collapse DURING the SB