Well you are right about that of course.
I think that Hunter could get 2 or 3 crucial sacks in an important game while the opponent concentrates on stopping the other Vikings rushers. Zimmer tells his players to stay where they are supposed to be, keep playing hard, and eventually the big play might come your way.
I think Hunter is long overdue for this happening. He shares duties with Robison and it's easy to see one of those guys being ignored while tending to the task of more heralded Vikings players such as Anthony Barr, Everson Griffen, or Harrison Smith!