That is, you can get into coaching while working on graduate degree, such as business management, where you learn lots about organizational leadership skills, and apply that in your coaching on the side. Then work your way up the ranks of coaching from there, just as you would have to even if there was a degree and major for actual coaching. Or just show up and work your way up after a pro career.
But I suppose if guys like Jon Gruden and Urban Meyer wanted to partner up and start up a school like that, they'd have some success with a lot of interest.