They said last year that Gannon's defense didn't work because he didn't have the right players (Rich Kotite vibe) but now that they have pro-bowl level players at many positions his scheme "works" - however - it does seem like many football minds could run a successful defense with these players. It's an illogical conclusion, much like Lisa Simpson's tiger rock.
Lisa: By your logic I could claim that this rock keeps tigers away.
Homer: Oh, how does it work?
Lisa: It doesn't work.
Lisa: It's just a stupid rock.
Lisa: But I don't see any tigers around, do you? (We keep winning don't we?)
Homer: Lisa, I want to buy your rock. (I want to hire Gannon as a head coach)