I don't think it just be beating BSC opponents. It'd have to be winning numerous championships and beating FBS teams regularly including Big Ten teams (which doesn't appear as a possibility anymore).
The standards are now set pretty high for UND football (by what state football fans are seeing from the Bison) and as it sits today a win against them (3 time defending champs). Would go a long way in installing confidence in what the program could become (at least for the fans). It's a giant step forward vs baby steps. And more people might take notice in those giant steps (beating an FBS or NDSU). Of course the deal sucks, no doubt about it. But we go play FBS teams all the time for money, no one seems to care (why? Money? Chance to beat the "big boys"?). In essence, it's the same. Of course NDSU isn't FBS, but besides the "title" the reasons are the same. This would be ok to schedule if NDSU declares FBS? Because if they do we will be guaranteed they never step foot in the Alerus. They have the stadium for it, UND doesn't.
Brock Jenson said beating Kansas State was the biggest win in the programs history (and that was after winning back 2 back championship games). So just winning the BSC, while a great first step, I don't think does much for the program. They'd need to go deep into the playoffs.