It's too expensive for the experience that you get now that you can watch it in 720p curled up on your couch for free. With better views, no buyer's remorse if your team get's blown out, 10 steps to the bathroom, no OWI risk for those of you who drink, and all the taco dip and pickle rolls you can stuff in your fat face. And if Stanley starts playing soft toss with Penn State's DBs, you can go mow grass.
Seriously though...for a family of 4 that lives, say 2 hours away, you've got $200 in tickets minimum, $50 round trip in gas, $100 in meals, popcorn, miscellaneous stuff, and that's just the bare minimum. So you spend $350-$500 to go watch Kirk Ferentz not play Noah Fant against NW and get beat when it's 17 degrees outside with a hammered tailgater swaying into you for three hours.
If you have to hotel it one night then you're in even deeper.
The people wondering why attendance declines are also people who think every family pulls two $100K plus incomes.