Yes, I know. And if you look at their games, you'll see why. Don Shula, Dan Marino, and the Miami Dolphins created a blueprint for beating the overload defense. When Dan Marino nonchalantly says it's too bad they didn't get a chance to play them in the 1985 Super Bowl, because the Dolphins matched up real well against them ... he's being very understated. In 1985 every team in the league tried to use the Dolphins blueprint for dealing with overload blitzes--which became an NFL staple over the next 30+ years. Most teams fared better, and that Bears defensive record never really rose to those heights again, because people had figured them out once the Dolphins showed the league the way.
In the playoffs that year and the Super Bowl the Bears dominated, none of those OC's really had enough time to tweak their systems to do the things the Dolphins did with the quick passes and hot reads. And, almost none had a QB capable of pulling it off. None were in the same tier as Dan Marino with the combo of phenomenal field vision, instant-recognition, super-quick decision making, the fastest release the NFL has ever seen, a strong arm to gun it in there, and pinpoint accuracy to beat great coverage. Sure, some teams had most of those elements, and every team had at least one or two, but few really could put it all together. San Fran had a guy, Montana, who had a decent release, a poor arm, but great vision, instant-recognition, super-quick decision making, and a team built around throwing quick short passes ... which was exactly what you needed to avoid that overload blitz. Also, they had the best collection of pass blockers (OL + RB + TE) in the game. So yeah, they followed Shula's plan and beat the Bears that year ... after the Dolphins showed htem how to do it. Also remember, that San Fran defense was exceptional, and often it doesn't get the credit it deserves, while that offense of theirs maybe gets too much credit.
But before the Dolphins showed the league how to do it, I would stand behind my statement that the 1984 Bears were the better team. I don't think San Fran could have tweaked their game enough in a 1 week layoff to impelement what they needed to do. But being a dynasty themselves, they dang sure took a month in the offseason diagnosing it. Both great teams, no doubt. As were the ringless Dolphins, who were only one unfortunate New England and Steve Grogan game away from probably being the NFL Champions. I so wish Dan Marino had won that ring ... it was his best shot. We did not match up well against San Fran. Our defense just wans't good enough, and their defense was world-class.