It was more than a miracle that won that game. It was basically won via great defense, and then those two miracle passes. The Vikings were supposed to destroy us, but our defense held them to only 1 TD from a full-field drive. The other TD was from an ultra-short field due to a special teams gaff. The defense also held them to a field goal attempt, which the Vikings missed from about 45 yards if I remember right, which was a long field goal back then. Then on the last Vikes drive before the Hail Mary, the Vikings had a third down and just needed to get a first to put the game away, and our defense sacked Tarkenton.
In short, the Cowboys great defensive effort kept the game close. They knew if they could just get the ball back to Roger, we could win. And, man, did he ever deliver. I hear what you're saying. We can't depend on a miracle happening, but I do think if the defense can keep the game close, we have a chance.