I have never understood the idea in this game that healers should dps in any and all content, if you are playing content that has enrage times, burn phases or just tight dps checks in general you should be pulling healers from your static/guild/linkshell healers who want to and are aware of these things and not pug healers.

If you are talking levelling roulettes or similar who cares if they don't dps I'm certain if you install a parser you will see that if the dps classes in your party were to play more optimally they could also make runs far faster singling out healers for not making runs faster when there are at least two other people whose sole purpose is to deal damage is kinda silly especially in an environment where face rolling will largely suffice.

You should never expect random people to play how you want want them too they will do whatever they want no matter how much you don't like it, if there is an easy laid back way to get a reward there will be many people taking that road.

This all pointless though the healers not willing or are to lazy to help with dps likely will likely never see this thread, just making an account here requires more effort than dps in dungeons after all.