Yeah, I remember you saying this before. My response is the same. Follow your point through to its intended conclusion: All Big 10 teams except Minnesota lose all their non-conference games and all their bowl games. Collectively, the Big 10 reputation slides. The next thing you know, the conference is seen in the same light as the MAC. How many of those recruits will flock to Minnesota in that situation?
Is the Ohio State and Michigan rivalry great because they push EACH other to keep up with one another? I say YES to that. It may be a bit ironic, but it is true that the better your rival is, the better you will be unless you decide not to join the battle... at that point it isn't a rivalry anymore.
An individual recruiting battle may be lost here and there, but having a strong conference makes us ALL better in the end. I'd rather improve to Wisconsin's level (and have their winning put pressure on the U) than have them sink to our level. The recruits you are talking about will be lost EITHER way. If everyone else in the Big 10 sucks, they will just go to the PAC 10, SEC, etc.