In a nutshell, an extra conference game on the schedule means half the teams in the league get one more loss. That extra loss, depending on which teams take it, could make the difference between the SEC winning another title and not ever having the chance. If Bama had played in Athens last year instead of playing Western Kentucky, maybe they lose that game. All else being equal, that would've sent a 2-loss team from the West to the SEC title game, and that game would no longer have been a de facto semifinal, but an elimination game for Georgia. Those things aren't really unique to the SEC. 3 of the 5 power conferences play 8 game slates, and one of the conferences that does play 9 games doesn't have a conference title game. There are potentially inequalities there as well as a million other places, because it's a sport with a 12 game schedule and ~75 true competitors, but the 8 game schedule is hardly as conspiratorial as you're making it out to be. The SEC is the only league in which those schedule inequalities dramatically affect the national title picture at the moment, however, due to the chasm separating the good and bad teams in that league, which doesn't exist in any other major conference right now.