I don't think you watch good teams enough.
Yes, there usually is a primary puck-moving defenseman on each line that usually initiates the break-out.
But the other defenseman is still responsible in some way for the break-out. Teams tend to over-play/over-pressure the puck-mover, and often times he moves it to his partner to get the puck moving on his behalf.
Even the most "shutdown" of defensive defensemen - Willie Mitchell, etc gets this done with efficacy.
Have you ever noticed how Petry and Smid are often stuck passing the puck back and forth with each other, it's because Petry feels the pressure, sends it to Smid, but Smid doesn't have the confidence/ability to make that pass/play in Petry's stead. He ends up either banking it off the boards in some type of nothing play, or throwing it back to Petry who has to try to bob and weave for a lane again.
Whereas a unit like Edler-Hamhuis doesn't seem to have the same problems, because as "shutdown" a defenseman as Hamhuis is, he's still able to make a decent first pass.
Same goes for the Schultz pairing.
Maybe I can ask you this. Do you think Smid/Nick Schultz won't be bottom-30 players on that list again this year? If your argument is that it was last year's stats and it can't apply to this year, then I can't help you
.
I guess Erik Karlsson being the best defenseman on that list makes him a garbage puck-mover because it was only last year