I've made the same topic on tank forums, but I thought about bringing it up here to see your thoughts. I've had a nonstop barrage of tanks going through whole dungeons not using any cooldowns and some getting snippy with me when I ask them to do so. He did the sit emote before every pull and was whining. Also had a couple not know what "cooldowns" were and had to explain them how to mitigate.
This is VERY common in expert/60 roulette for me and heavensward content. I usually see cooldowns being used in very early content but thats it. Isn't that part of the fun of being a tank or am I missing something? Please tell me there are other healers paying attention to this and trying to "mitigate" the problem. Especially for newer healers who have to try to pick up the slack while learning on the fly.
Usually I just kindly tell the tanks and move on.