If Northwestern (or Baylor) were any lower, why would anybody ever take those jobs? If one is going to enter a major conference in a game that costs money to play, one should at least have a reasonable expectation that there's a chance for success at a given school. Putting NW or Baylor any lower would pretty much guarantee that those schools would be SIMs for eternity, and that's not good for anybody.
Total aside, but Baylor has been better at basketball the last few seasons in the real world than 2/3 the ACC and a lot of other major conference teams. So perhaps Baylor being too high is a poor example.