Every year populate half the top 10 with SEC preseason, regardless of bowl performances and head to head results with other conferences which actually hint at there being more parity between the conferences than most assume. Then, as the season plays out, highly ranked SEC teams climb rapidly when they beat another SEC foe and don't fall too far when they lose to one due to their high rankings. As it all plays out, each power conference has teams beat up on each other, but at the end with the early high rankings, the SEC usually can boast multiple teams as playoff or championship caliber.
Bowls play out - SEC losses are chalked up to "not caring after the SEC grind", a new season dawns, rinse, repeat.
With half the top 10 being SEC, we are set up to have the same situation this year. Again. Meanwhile, some have pointed out the Pac12 has 6 teams in the top 25. Look where they are rated. They are in that territory where one loss will bump them out.
I'm not saying the SEC isn't the best conference. I'm simply saying there is more parity within the Power 5 than all the "SEC! SEC!" bobos would ever care to admit, and this tends to come out when they actually play games head to head. But, if you are going to fill up half the four team playoff with SEC teams, or even BOTH teams chosen by rankings for the old BCS championship, this tends to become a self fulfilling situation.
I've had multiple people tell me over the years that they dislike sports that put the winners and loser in the hands of a judge - sports like figure skating or gymnastics. Some of these same people will argue college football is just fine despite "judging" being such a big part of selecting champions. The solution, in my mind, is to make sure each power 5 champion is represented in the playoff, and no more than one team per conference can be in it. Otherwise, bring on the figure skating judges and don't complain.