Jackson notwithstanding, no one, and I mean no one, wants to see an upjumped midmajor in the playoffs. Not good for TV ratings. Believe me, if it is a close call between Louisville and any state school with a legitimate football history, guess who is left out in the cold? If it's a close call, even a Baylor is going to take priority. The average college football fan has barely heard of Louisville and has no interest in watching them get hammered by the likes of Ohio State etc in the first playoff game.
Regarding ratings, the Louisville-Clemson game was the second most-watched college football game so far this year (6.0 share - meaning that 6% of all TV that were turned on during that time were watching that game). The only game with higher ratings this year was the Sunday night game between Texas and Notre Dame during the first week of the year (earned a 7.0 share).
https://sportstvratings.com/louisvi...t-rating-abcespn-saturday-ratings-highlights/
Probably one of the more amazing things about that 6.0 share was that UK-Alabama was on at the same time (which by the way was the highest rated show on cable that day), as was Indiana-Michigan State (Big Ten Network), Missouri-LSU (SECN), and Arizona State-USC (FOX). The Texas-Notre Dame game that earned a 7.0 share had no competition at all.