There is an inherent interdependency in any type of unit, professional team sports being no exception. For an offense, a quarterback can’t throw the ball to pass catchers who can’t get open or can’t catch. Wide receivers can get open all they want but are dependent upon a quarterback who can get them the ball. The offensive line is the most dependent of all. Their blocking is entirely useless if the players holding the ball don’t do anything with it—including running backs who don’t hit the holes that were designed into the play.
Trai Essex knows a little something about this as a former NFL offensive lineman, spending seven years with the Pittsburgh Steelers.