Hanifin has never in his life played tough minutes and as recently as last year was struggling in
bottom-pairing minutes. The guy was -20 playing by far the easiest QoC on his team together with TVR and had almost 63% OZ starts. So no, it's not "arguable".
Myers is basically the definition of a 2nd pair D. I don't think he has played any sort of tough minutes since he was in Buffalo.
Girardi is playing with an elite #1D by his side, maybe a top5 d in the entire league and on a loaded team nonetheless. The only reason he looks decent is just that. Ask Rangers fans how they feel about Girardi playing tough minutes
EDIT: Actually looked at Girardi's numbers w/o Hedman this season. He's 47 CF% and only even at 50 GF% on a team which are +58 in goal differential. So yeah..
I don't think you appreciate just how big of a difference it is for a D to go up against the Crosbys, Kucherovs, Kanes and Ovechkins of the world vs playing some average 2nd line guys or bottom-six guys. It's easy to look good in easy minutes. Even Benning looked like a competent D in 16/17 playing depth minutes. Nurse initially drowned trying to fill the gap after Klefbom once he had to go from 2nd pair to 1st pair. It's a huge difference.
That's the thing most people who discredit both Larsson and Klefbom doesn't seem to get. Because they don't look sexy out there shutting down the best players in the league, people think they're trash. Nothing could be further from the truth.