Simple response: It is the tank's fault.

Other response: Some tanks, especially new ones, have the mentality from the community that tanks MUST drop tank stance to deal more dps, or they are flagged as a crappy tank.

I was in a few Zurvan Ex battles where people are now starting to blame Healers and Tanks if the first Soar isn't skipped with a 1-2-6 comp. It's getting sad. Many PF groups don't fill up as fast anymore because people don't want to hear WHY a certain mechanic wasn't skipped.