As many have said, the stacking of stamina isn't necessarily a mindless following of what people want. In fact, other players want the high stamina tank because quality tanks did this before, just your hunter raid leader might not truly understand the reasoning behind why EH is generally better than avoidance.
In fact, the gearing of tanks has changed significantly even in WotLK. In Naxx, the variety of stats on gear was varied very well, resulting in tanks using tier, 25 man, and 10 man content gear together. I know I had a block set, an avoidance set, and an EH set. The reason behind this was that Naxx had old raiding mechanics on its bosses still so that tanking gear was still situational. Loatheb was a great example of where a block set significantly reduced the amount of damage you took. Now, the mechanic is generally to make tanks sustain a giant hit or two in succession, and make healers spam them to ensure they get a heal off before a 2nd or 3rd hit kills the tank. In addition, gear is much more linear in improvements, such that you gain x amount of armor, stamina, dodge, defense and parry by upgrading to a higher ilvl of gear, as opposed to deciding whether the increased armor and stamina and block were worth the loss of defense and dodge. The compensations in ICC should help return things to a more balanced state where reasonable avoidance, decent mitigation, and sufficient health pools should be much more common than pure stamina stacking for all situations.
There is definitely much more to this discussion, such as EH is almost always best for a progression fight, but if you really want to better understand how to heal a tank, try tanking as an OS or on an alt. Also,
tankspot.com is a much better place to educate yourself than these forums.