Take this with a grain of salt because it's all just theories and guesses, but I suspect security leads strategized heavily about how to prevent students with South endzone tickets from going over capacity in the North endzone (which has historically been a thing but is now finally leading to fire code/safety issues with the increased student demand). When it came to game time, they were unable to pull off this single direction filter and decided to deny access from both directions. Extremely poor design leading to a brute force strategy with not enough staff to pull it off.I’m not exactly sure why it would be any different than before. There were just walls there before and how there’s a fence. Why the refusal?
There is an easy fix for this next season: the entire student body should be located in the North endzone and Northeast corner of the stadium - sell cheap tickets for the South endzone to the general public. Demo the entire thing and replace it with a beer garden like Duke did when the funds are available to do so.