I dont have a healer as my main, but when i do heal its 95% healing only, i could not care less about doing some damage, if i wanted to play as a damage dealer i would have joined a party as one, i joined as a healer deal with it, same when i play on my PLD new skill for dps? dont care when im in a party to weave it into rotation for abit more dmg.
I find healing relaxing, no stress to do max damage all the time and thats nice, if i am also forced to push my healer to the max then i would quit the game plain and simple, its nice to have somthing to fall back to when you want to do something new.
Not my fault that SE made the current endgame all about damage and less about making it fun to play, tanks and healers have to dps to clear a boss or he enrage(enrage must be the worst mechanic ever to have made it to any mmo, where is the challenge in just enduring a long hard fight?).