How complimentary are the different products, really, though? How dependent is widget A on all of the other widgets?
Look at the last non Covid year, 2019. Of the top 9 most watched regular season games, 6 of them were conference games. 5 of them only feature teams that either are in or soon will be in the SEC.
ESPN is banking on having the biggest brands in the sport playing each other, being a huge draw, and there's little evidence to indicate that it won't be. They've got teams with massive fanbases that aren't only regional. And they control a massive media outlet that will continue to market the hell out of their product and make sure that people know that it's the best game in town. Not to mention, other media outlets will continue to market ESPN's product as well. Other sports media aren't going to suddenly stop talking about SEC football.
I don't particularly like it, but this is going to make money. People thinking that adding OU and Texas is going to result in the downfall of the SEC and ESPN are going to be disappointed.