There's actually a lot of good insight into the mind of tanks in this thread. I'm far from "uber leet" as both healer or tank, but to be honest, I'd rather work with a new tank as a healer than a new healer as a tank regardless of my ability to do both.

I think most new tanks leave the tanking job due to, like it's been said, DPS forcing pulls faster than the tank wants to go, even if it's just to start the dungeon. I'm TOTALLY fine with the pace the tanks take, but I'm always up for larger pulls. EoS and I got this

A simple "Nice! If you want, you can grab an extra set of mobs and see how we do. I got your back" is usually all it takes. Especially (ESPECIALLY) if you know the tank *IS* new at the whole thing. Why people beat and berate a tank for being new and "sucking" when they should be teaching and training is beyond me. I'm a manager at my work, and while I would LOVE for every new person who walks in the door to be able to hop on a fork lift and stack stuff 30 feet on top of steel without needing any training, it would be foolish to expect it.

New tanks need to be trained and taught, not berated until only a few of "us" remain.

The other problem is of course that, DUE TO the berating and bashing of tanks, the tanks that are worth a damn will 85.462% of the time (number made up) stick to FC's and LS's. Why? Because they also don't want to deal with the problems bad DPS and bad healers bring to a pug and so they know the most likely they will not have to deal with the rude ass internet mafia.

Less tanks queue with pugs = a dying game.
No queue = boredom.
Boredom = taking money elsewhere.

It's a downward spiral. I've been bashed on as a tank, and I've been praised. Hell, I don't think I've ever actually been bashed on any job other than tan. It's a thankless job for the most part, and not one for the weak hearted. I'd love to get back into tanking, but again...trust issues. lol