It just doesn't happen this way, though. Many faceoffs quickly result in a change of possession. Watch what happens on 'offensive' faceoff wins on the other side of the redline after e.g. an offside call. If the puck goes back to a defenseman, he'll just send the puck for a dump-in, one which has a low percentage of retrieval.
The reason this worked is in part because Edmonton expected the Devils to just give the puck away off the faceoff win, as that is what teams do very frequently off opening faceoffs.
Every season is bound to have this sort of play, Anaheim won a faceoff like this against us. I imagine goals scored directly off faceoffs are weakly correlated with faceoff winning percentage.
These are the faceoffs that matter. The trouble is, you can't really win more than 65% of PP faceoffs and 60% of PK faceoffs. So when people say 'faceoffs don't matter' or 'faceoffs barely matter' it is acknowledging that the ranges between success and failure are small and that having possession in hockey (at even strength) is not a big deal at all. You'd rather have it than not, but a large percentage of the time you won't have it, and there's not a lot you can do about it. That said, Hughes's faceoff inability probably costs the Devils a few goals a year - if he could just bring himself up to 40%, he'd be fine, not ideal, but fine.