Is unholy dk more popular than frost strictly due to performance?

Frost DK is in my top 5 dps specs. I’ve always loved it and will always love it, but my brain truly doesn’t understand unholy. I don’t know why I can’t learn it, everything about it just looks and feels wrong to me.

Is this just me though? I know unholy is topping charts all expansion and I’ve just come back from a long break. All my favorite specs are doing well, including survival hunter, but frost seems to be invisible.

I got the unholy mage tower skin and that was the limit to me learning the spec which has changed since then anyway.

Am I just fucken stupid?