Exactly. That sort of scheduling disparity wasn't uncommon prior to 1960 or so, although the IU-Michigan setup probably is the most extreme example. The schedules were "normalized" around that time, and 1960 is also when IU moved out of its antiquated old stadium, which held fewer than 30,000 fans even with temporary bleachers. As for the why, I've never really researched it. My guess is that it's a combination of the football powers being able to dictate to the less successful schools, and there also may have been a revenue component to it. It's interesting, because the basketball schedules had been home and home for decades. It would be an interesting offseason topic.