Here is the issue: one is allowed to breach a contract as long as you’re willing to pay the other side’s damages. The issue on the GOR that hasn’t been tested in the courts, and is not as straightforward as you suggest, is whether the GOR is a transfer of property, such that there is nothing for a school to breach going forward — the rights are already gone — or is a promise to allow someone to televise its home games in the future, in which case it is a contract subject to future performance that the school can breach and be subject to damages.
Does that help?