You need to be good enough on defense to win.
This Ravens defense is a shell of their early-to-mid 2000s units. The difference is that they actually have an offense now. If Billick had a QB like Flacco he might still be their coach.
And SF is the most balanced team in the NFL. They have a very good offense.
We have an average defense. It is nowhere near good enough to carry a team. And it was never as great as Rex made it out to be. The stats from 2009 are nice but that unit spit the bit in big spots too. We could live with our defense if we had an average offense. Might not be a SB favorite but we would definitely be a playoff team.