At max level, tanking can be either really fun or very stressful. Most stress comes when you're attempting to learn a new fight and you have impatient people that would rather scream at you than let you know how to correct what you're doing wrong. If more people would try to help instead of simply raging, then more tanks would be in the queue. If you're a person who constantly stresses out your tanks by calling them bads/being completely unforgiving when they mess up, etc, then stop complaining that your queues are too long.