There's a limit to what student-athletes can be expected to do, and still remain healthy and be decent students. If you're going to compete with the Stanford's, Michigan's and Notre Dame's of the world, you're going to have to limit your season length, and even limit the number of practices.
As for the health of their players, maybe the Faculty Senate at ND State isn't doing their job?
What ND State does, though, doesn't change the calculus of how long the season can be in the FBS. There's a limit there, as long as these teams are connected to schools with prestigious academic reputations. Each of those schools is going to protect its reputation, and try to limit its liability, even if they don't always look out for the long-term interests of the student-athletes that they use.