In all honesty, numerous teams around the league on the cusp of the playoffs could play the "if only" game.
Sure, we dropped games to the Giants and Rams that we never should have let slip away. At the same time, we've stolen a game or two as well and had the ball bounce our way in critical spots in big games as well (e.g. Baltimore, New York).
At the end of the day, things tend to even themselves out.
Bottom line is you have to be good to be lucky, but you also have to be lucky to be good. We can't deny we've had some good fortunes the last six weeks and that has helped us as much as anything.
If you don't believe that luck plays a role, just go roll the tape of Dallas at Cincy and Pittsburgh at Dallas to find out.