Your argument seems to be that our football program has no value to offer opponents. If you believe that, then we might as well just shut it down and join the C7 anyway because we're never getting an invite anywhere else. It's not an argument for staying in the NBE.
I don't believe that. A home-and-home offer from UConn is an upgrade for a mid major over playing another mid major. It doesn't "completely disrupt" anything. Team A was scheduled to host Team B on x date? They host us instead on the same date. Team B plays away at the Rent during their current bye week and the former A-B matchup becomes the bye week.
The issue is opportunity cost. What would we be giving up to join the C7 and go Independent in football? At $2M per year with crappy opponents, I can't think of anything, except maybe the "opportunity" to make less TV money while destroying our basketball program in the process. Under any sort of normal circumstances you do not do this, but this scenario is so bad that we essentially aren't giving anything up by leaving.