OSU is the only P5 school in a state that has 4x's the number of people that exist in Iowa. In addition, Ohio is the birthplace of football and high school football is top notch. In addition, they are a national program that allows them to get high end skill position talent from California, Texas and Florida.
If you have not lived in Ohio or spend extended time in Columbus, OSU is in an entirely different realm of recruiting and fandom than anyone else in the Big Ten. In fact, I'd argue OSU has been a classic underachiever within the playoff format based on the talent that they have every year.
OSU is a football factory has produced more consistently than most of the rust belt industries within the state!