I think this is the best way to say this...
Can you make a plausible argument that we should be #6, ahead of Alabama? Yes. However, I see why people have a hard time entertaining that argument when we lost by 25 as a 22 point favorite to an unranked opponent.
Lots of people are talking about some kind of bias where we are judged more harshly for that loss than another team would be. People seem to have forgotten that in 2017, the committee held Ohio St - not UT, not some "little engine that could" team, Ohio freaking St out of the playoff for getting blown out by an unranked Iowa team, even though their only other loss was to #5 (finished #3) Oklahoma and they won the Big Ten title game. The same thing happened to them again in 2018; their only loss that season was a blowout loss to Purdue. They had 4 victories over ranked opponents and won the Big Ten title game too, but still didn't get in.
It happens. We choked and got embarrassed. You can argue that we're under-ranked by one spot, but we don't deserve to be any higher than we are. Let's move on.