I'm sorry but I disagree. As a tank main (been one for 12 years between WoW, FF) I will always live by the concept that there's nothing easier thank tanking. We do least mechanics and usually they are set in stone and we hardly have to adjust. People perceive tanking as wrong and it makes them scared of trying, but really is a job that takes less time to master and has to deal with less variables...
On the other hand healers, holy fuck, I don't know how you do it, having to do your part and account for everyone else shortcoming, you will always have my praise