If Bama beats LSU tonight, then what? Since LSU already beat Bama, each could claim the BCS Championship, since each would only have one loss - to each other.
There are many situations in sports where each team could have one loss, to each other, but only one win a championship, or advance in a tournament. That was the point you made and it is a fairly ridiculous point because the situation you describe is so common.
Yes, but 12 teams make the NFL Playoffs and 68 schools make the NCAA Tournament. It’s absurd in a sport where only two teams can play for the championship that a team could lose to a team in the regular season and beat them to win the championship.
Except that the argument of the anti-playoff crowd is that "the regular season is the playoffs". But then they turn around and defend a intra-conference rematch and ignore the whole "playoff round" that occurred before. I'd just like some consistency.