I’m not sure what you think linking an article that’s behind a paywall, and that says Columbus is a good area for college basketball TV ratings, does for your case.
You have no data for your case. None. At all.
You need to be able to show that TV ratings are highly regional AND that people tend to only watch teams in their region, AND that regional ratings are highly enough that dropping them from a super league would have a big negative financial impact. The last part is the hardest, college basketball ratings are so terrible that getting rid of mouths to feed is more important than worrying kicking some of the folks away means the minuscule relish tray might disappear. And saying “Calipari draws ratings for Arkansas!” is like saying “Winning draws ratings for Duke!” Personalities and winning drives ratings - that works in MY favor, not YOURS. If you want to say “nobody in the SEC watches unless their team is winning, and/or they have compelling personalities associated with the team” - I’d agree with that. That’s not your position though.