Well because everybody KNOWS that Bama is always going to be one of the four best teams. You know, like, in the abstract. They could have lost three games this year, and they'd still be one of the four best. Even four. Heck in addition to the two games they actually lost, they had three more games I believe it was that easily could have gone the other way. Literally if just one play had gone different. A missed FG or a dropped pass. So they could have gone 8-4 and still been one of the four best teams, just on pure ability, and prowess, and like, who would you pick to win a game if you had everything riding on it, Bama or TCU? Most people would probably take their chances with Bama even at 8-4. Because they're just better.
And obviously we're not going to pick the four playoff teams on that basis. And the fact that fans are even arguing about this just shows you once again how morbid and unwholesome CFB's postseason is. And how it is crying for a much more strict W/L criteria, which the expanded playoff will come with, even if there are still several at-large bids....