So these "people" are complaining that you as a tank are stacking stamina? Hmmmm spirit ftw?
Ignore these peasents, forget parry it's not good to stack and just have whatever gem u fancy to activate meta and stam the rest. Simple really there's hundreds of posts on tankspot telling tanks this and yes it works (I'm 70k now buffed).
Unless they own a tank and do icc they are ignorant of the benefit to your raid as a whole if u are stacking stam gems till your ears turn blue.
Go forth and tank with stamina and they will follow.
So long and thanks for all this fish