The problem with that comparison is that other tanks generally don't have a whole lot of abilities they want to use on the same resource as their active mitigation.
Think about it.
Things that use Holy Power other than SotR/WoG: (nothing)
Things that use Rage(Bear) other than SD/FR: Maul
Things that use Rage(War) other than Shield Block/Barrier: Cleave/HS (with no proc)
Things that use Frost/Unholy runes other than Death Strike: Death & Decay (with no proc), Plague Strike/Icy Touch (only used if you let diseases fall off between Outbreak).
Things that use Chi other than Purifying Brew/Blackout Kick: Guard, Level 30 Talents, Rushing Jade Wind, Breath of Fire, and indirectly (via energy) Dizzying Haze, Path of Blossoms, Transcendence: Transfer, Healing Sphere.
It’s true that monks have many resource-consuming "fun buttons," but they’re not unique in that regard. Bears, for example, are limited by both rage and time (which converts to rage). [...].
For Monks, you mention Guard, which is just as important as Blackout Kick and Purifying Brew, not some auxiliary fun/utility button, and Rushing Jade Wind, which is effectively free because it replaces a Blackout Kick. Breath of Fire and the level 30 talents are available to use for more damage, similar to Maul or SotR or Heroic Strike, or for group healing. If Healing Sphere were free, it’d replace Tiger Palm rotationally, and make them defensively GCD-limited. Dizzying Haze, Path of Blossoms, and Transcendence: Transfer are intended to be used at range, or to get to range.
As a Brewmaster, you shouldn’t be using the level 30 talents rotationally, other than perhaps against sustained magic damage, or where their group healing utility is more useful than your own survivability. We fully intend you to maximize your survivability and damage reduction while actively tanking, unless the utility provided by them is especially useful.