"I have more health than the tank, think I'm gonna pass on this run boys"

My experience as a newly lvl 70 prot paly tank in short. Everybody wants a tank for pugs and heroic dungeons, but nobody wants to help them gear up. If I'm not full t6 already, forget it. I insist that I'm using full consumables to make the run easier and that I know how to play, but it doesn't matter. I can't even get a raid for Kara as an OT.