It is not possible to play without doing dps as healer? every day i find someone...

[ThorneDynasty]

Seriously, most of the time past the level 50 content you are able oGCD heal, and only have to cast in the roughest and draggiest pulls after you run out of everything else. Are you just not plain using any GCD at all between "throwing a DPS here and there" then? But if people are so annoyed they leave your party, you probably just rub it in their faces in an obvious way, like uselessly recasting Physick on fully healed targets over and over or something.