Statistics say that you're much more likely to score points on anu given drive when you have explosive plays. That's because defenses are really good too and once you end up behind the chains they'll probably make you pay. So if you think about starting at the 25. 3.5 yards per play all the way to the end zone is likely not going to happen. Eventually you'll get no gain on a run play or take a sack of throw an incomplete pass and now you're in danger. We won the Superbowl on that philosophy. And it was working this year, statically (before it all fell apart). Heck, we just held the hottest team in football to multiple field goals and turn overs.
