I think there are many situations where the deep wing has to get the spot, but the H and L need to be hauling rear down field to take over the spot. On a long pass, there is no way the H and L can get the spot, impossible since they are hanging at the los longer than in 5 man. But, when a long pass is seen, they have to moving down field very quickly. The deep guys get the spot, and the H and L take over in those situations. On normal running plays and shorter pass plays, sure, the H and L have the spot all the way.
I think too many times we see the H and L on long plays hanging at the los and not getting down field quickly.