I'll tell you why it's difficult for anyone to give you credence.

It's because, from the Resto Shaman perspective, I'm being sat - for you.

Not because I'm not a good healer. Not because I don't know my class and spec like the back of my hand. I'm being sat because your ability to push out ridiculous amounts of healing completely negates anything I bring to the table. I simply cannot keep up, and the CD's that I -do- have are extremely limited in terms of positioning and scope. My raid is better off - by FAR - bringing you and your "bad toolbox" over bringing me, and my shitty throughput and bad raid CDs.

The same can be said of Holy Priests at the moment, as well - because between your massive throughput and your far better mana efficiency, there is absolutely no reason to ever bring a Holy Priest when you have the option to bring a Resto Druid. Their "tanking CD" is laughable, at best, and simply doesn't outweigh the other things you bring in your favor.

THAT is why it is difficult for other healers to give you credence. And as much as you may not want to address or acknowledge it, it's still there. And no amount of justification ("But that's ALL I BRING") really matters when ALL THAT YOU BRING means other healers are being sat specifically because ALL YOU BRING is so much better than ANYTHING they bring.