As a huge Gopher football fan, who lives in the metro and has the means to get season tickets--I agree with this STRONGLY. What is offered to me as an attendee that I can't get at home? I LOVE going to games but the gameday experience largely sucks.
Tailgating is expensive, spread out and inconsistent. Plus, I don't have friends or family who go to games so if I did my own tailgate it would be my wife and I just drinking in a parking lot. Cool!
Other teams do different stuff. Oregon has a HUGE, PUBLIC, FREEELEEEE TAILGATE. You can buy beer, food, etc. but there is music, TVs to watch other games, people milling about. When I was there for Oregon vs. Nebraska we spent about $60 on food and beer. Had a blast. Watched some games. Way more fun than a bar as it was outdoors and open. Could the U do this? Yes. But they won't.
Sadly the Gophers pre-game is closer to Northwestern than it is to Michigan or Nebraska. And I'm not paying a premium for that.