All of these tank comparisons don't really get to the issue because no tank really has the issue SCH has. The closest being DRK and even then if played well they don't lose anything.

What if tanks burst phases locked you out of using mitigation for 30 seconds?

What if tanks used their gauge for dps as much as mitigation.

Sure these things can be played around, they have for many years in many iterations. That being said all of these tank comparisons are missing what SCH has. A clear and definitive sacrifice of one thing for the other.

Even if you play well, even if you manage to figure it all out and play Momo levels. At the end of the day there is a clear sacrifice of damage for healing that other healers don't have. You may call it fun, you may think it's OK and it gives choice, but it's counter to our kit and it's bad design