Coaching undeniably matters, as illustrated by who is still around in the College Football Playoff.
You may have all the resources at your disposal. You may have more talent than the other team you are taking on. However, in the game of football, coaching will always matter. In the day and age of the College Football Playoff, only two types of head coaches can realistically win the whole thing. You either need to develop into being a CEO-type, or be a defensive-minded guy who loves to recruit.