OSU needs little to no help in getting media exposure. The brand is one of the tops in CFB. Anytime OSU has a good team, they will get the prime time games and media hype.
Also, for every SEC example of a strong conference not hurting I can give you 3 (FSU, Nebraska, Miami) mini dynasty's that were built in large part on a really good team playing in a really weak conference. Going back further the 70's and 80's were full of various Big 2 and Little x kind of setups. The modern ESPN aided SEC is the only one I can remember where the schools don't get penalized for losing a late season game.
I look at it the way I look at most things, what gives the best odds for success (because nothing is certain)? A strong scUM may satisfy the nostalgic yearnings for the glory days but it also increases the chances of losing to them. Ditto the rest of the B1G. The pragmatic odds calculating part of me says give me the easiest road to 13-0 possible and take a chance on whatever the playoffs may bring.
IMO we are never going to get the SEC treatment on a one loss team, even if the B1G were tough again, because of ESPN and their obvious, financially driven, bias towards the SEC and B12.