I don't think it's really a matter of what anybody wants. Rather, the simple fact that you can only heave the ball downfield after you have forced the other team to respect something else -- a running game or a dink/dunk short passing game. Something has to setup the long ball, or you are just asking to get eaten alive.
Unless you have an extraordinarily skilled QB, the only options for slowing down an all out pass rush are things like draw plays, screen plays, and other nasty little dink and dunk stuff to make an all out blitz pay the price.
Unless you have an extraordinarily skilled QB, the only options for slowing down an all out pass rush are things like draw plays, screen plays, and other nasty little dink and dunk stuff to make an all out blitz pay the price.