They don't have to be mutually exclusive. One paragraph says what I'd like to see and the other discusses the reality of what we have today.
My preference would be to have a conference of champions. But, we don't have that, so we're going to have teams that make the field that didn't win their conference. Not my choice, but I can live with it.
tOSU was 10-2 as a non-CCG participant. The others in contention were Tennessee, Miami, UNLV, Army (10-1), and Memphis. Iowa State was also 10-2 but was a CCG participant. Of that cast of 10-2 teams for the final 2 spots in the Round of 12, who would you have taken? I'd have taken tOSU (win over PSU and loss to Oregon) and either Tennessee or Miami. So, I don't have a problem with tOSU getting a chance. I would have had a problem with a 3-loss team (not a CCG loss) getting in over a P4 2-loss team (Tennessee, tOSU, Miami, Iowa State).
As for your second paragraph, the CFP was driven by ESPN and/or the other TV networks to generate more revenue. For 120 years the presidents, ADs, commissioners, etc. had no problem letting the polls decide who was the MNC in football every year. The ONLY reason it changed was because of the TV money. The current system only has 1 champion; the old way multiple schools got to claim a recognized national championship.