It all looks super promising until you start plugging in results for the other likely wild card contenders. With the Bills losing to Cleveland, Dallas, and Baltimore, while beating Miami and Denver, I have Buffalo at a 50% chance with 3 games to go. And assuming we beat the Jets and lose to the Steelers, we're left with a 91% chance if we beat Pittsburgh or a 35% chance if we lose. If god forbid they drop that Denver game (which I'm decently nervous about), it's basically over. at that point.
Edit: Picking some more of the Week 15-17 games for AFC opponents, the chances end up at 63% if we beat Pittsburgh and 31% if we lose.