Except it's not always about the gear. It's a lot about education. We have now cleared Naxx, but we spent several nights beating our heads against Gluth and Grobb. Gluth - how do I convince everyone to not drop circles in the middle of the floor. Gluth - who do I use to tank the adds? A holy pally? Should he respec to prot, or does he last longer with his more powerful holy heals? Or what about the DK? He can slow better, or maybe I should just assign a mage to help slow. Do I put my priest back there to heal, or a shammy with earthbind totems, even if the priest is a stronger single-target healer? Oh, and Heigen, which is the perfect example of this - how do I teach an entire guild to dance?

Yeah, I can (and do) watch tankspot. But we're casual, and I never have a perfect raid make-up - I have the 10 people that we have on. Some of them have cleared the content a dozen times in pugs, some have never been in Naxx before. So we have to learn. And that takes time and wipes.

The gear requirements in Naxx are not comparable to those in Ulduar 25. You need gear in addition to learning the fights.