Some coaches want to win, some coaches expect to win, but some coaches actually need to win.
College programs, unlike their professional counterparts, are often defined by their coaches more than their players. Students shuffle out in three or four years, but coaches are allowed to stay for decades.
That's why coaching icons last longer than playing icons. When you think of Alabama, you think of Nick Saban or Bear Bryant. When you think of Florida State, you think of Bobby Bowden. When you think of Penn State, you think of....never mind.
All athletic departments are looking for their own version of that, and if one man proves incapable of realizing their vision, he is given a swift, judicious axe.
Only wins, the all-important figure on a coach's bottom line, can ensure one's safety.