Like it's been mentioned here already, I've run into jerk healers on both WHM and SCH. In a recent Ifrit HM run, we had a SCH who trolled by just using Physick on himself all run until he ran out of MP, and never moving out of the AoE/Charge, intentionally. Shortly after, in Garuda HM, I had a WHM who whined the whole run despite being a useless healer, then left after the first person died. I think we just need to accept that some players, and thus some healers, are pretty useless and/or rude.