You made my point for me. PSU joined the Big 10 due largely, if not solely, to financial considerations. PSU was looking out after its own self interests, as it should. But the reverse is also true. If financial (or any other) considerations dictate that independence is a better thing for ND, why is that any of Franklin's concern? His argument is a bad one. If there comes a time when it will be in ND's best interests to join a conference, I expect it will. But that time isn't here now. And it isn't Franklin's business to preach to us about it.
I didn't make your point for you. I said that's not why they did it. And instead that all PSU needed to was get their courage up, and a little gumption going and make this move and go ahead and join the Big Ten, which they wouldn't regret and would be great for the program, and they weren't really losing a thing, other than being independent, which is really nothing. And they so did and the rest is history. They didn't desperately want to stay independent and they quietly rue the move to this day. They don't regret it, they're happy to be in the Big Ten because it rocks to be in a powerhouse conference, even if it was a big move to make at the time.
I don't know, maybe they lost their rivalry with Pitt. Didn't they used to play every year, I don't remember at all. ND if it joined a conference might lose their rivalry with Navy, which is another totally unbending and defining tradition that is non-negotiable for them. But not USC though, that's convenient.
And I would reject the disingenuous characterization of ND's independence as being in their 'best interests'. It's just what ND likes. If anything it's proven quite an inconvenience to the athletic dept. as a whole. But they're badass enough to thumb their nose at the world. Because they're ND, true CFB royalty. The original blue blood. So don't defend it. And definitely don't present non-conference, nonaligned 'independence' as some obviously preferable and superior arrangement for a sports team to enjoy. That's just sounds odd, and even a little kooky.