You can have all the offense in the world you want, but if you don't have a defense, hard to win the games that matter. If offense won titles, Mike Leach would have a few national titles by now.
But I agree with neer on this one. Gotta have both in high school. A good defensive line will wear down if the offense can't sustain good drives and a bad defensive line will lose a 49-42 ball game.