I am not one that is comfy with speed pulling as a tank. Or being the very talented Healer that does a lot of DPS. I am just not. But I will try to do some on both sides. But, I do see both sides of this argument.
Slow pullers say (yes, exceptions):
I play the way that is comfy to me so that I enjoy it.
Speed runners can use PF.
Speed runners say (yes, exceptions):
I play the way that is comfy to me so that I enjoy it.
Non-Speed runners can use PF.
Umm, yeah...
What some of the speed runners are saying is that it is boring to pull single groups. Just like you say here. What some of the non-speed runners are saying, and I will use mostly your words, my words included in BOLD:
As a tank, it is boring to hit my area-aggro tool a couple more times and 1-2-3 things until they die insinglemulti- pulls.
Seems like as the tank, you are doing the exact same thing.