Just to be clear on a couple things, I don't think anybody is doomed (TV deals getting smaller, which is a very real possibility, is a challenge, it's not doom), and I 1000% agree that not every sport is in the same position, the revenue models are all different. The most obvious example being the NFL having very little presence outside free-to-air network TV. So the cable bubble thing doesn't really apply to them.
Most of what I'm saying is that these sports aren't doomed, but rather they have multiple possible futures, with some being better than others, and doing the short-term money grab in exchange for long-term damage to the product is not the smart play, and there's a lot of that going around these days as we enter choppy waters for the sports business.
I'm not sure how sound all of the pro sports valuations are, there might be a bit of an echo of "the value of Orlando McMansions continues to rise, why is that if the end is near?" circa like 2007 in that, but again, those same houses are now worth more than they were then, it's a question of the time horizon.
Anyway, as I said in that original post, I think for an entity like the Big Ten facing the uncertainties ahead and the challenge of this SEC, there is a big opportunity to think differently and make different kinds of long-term investments, rather than just desperately calling every bluff in an attempt to shore up the next TV deal and burning down the college sports landscape with this conference expansion merry-go-round that we've already lost.