OU beat undefeated Nebraska the week before they lost to OSU. They had started 4-0 before getting thumped by Notre Dame, and getting beat up that day. In particular, Granville Liggins, the key to the team's defense, got hurt. Since OSU beat OU back to back, they made some dent.
You want to make everything about football. And it is incredible that an apparently intelligent guy, would possibly think that SMU could possibly be better long term or short for any conference, than Kansas. KU is easily one of the top five basketball schools in the country. And while they are going through a dry spell in football right now, they are still a much much better member than SMU. I've been to a dozen SMU football games over the years. Except for Arkansas in the last season of the Pony Express, the best attendance was around 45,000 in 1965. These days, they would have by far, the smallest football stadium in the conference, and fill it half way, more than half the time. And they have barely as many students in their whole student body, as OU has in most seasons without COVID in the student section at the stadium.
I've lived in the Dallas suburbs since before the Dallas Cowboys played in a playoff game. Dallas doesn't give a flying flip about SMU football, or any other sport. SMU in a good season, probably has more football fans in Connecticut than in Dallas, outside of Highland Park.
One major difference between you and me. I want the Big 12 and to succeed. You really don't Your goal is for OU to end up elsewhere. I understand I'm in a minority on this board as it relates to that. But I'm almost certain that a super majority of OUr entire athletic staff wants to be in the Big XII< and wants it to be strong. And you'd find very few there, or in other conference schools to bring in SMU. They do nothing for the conference.