There's no reason for healers to be concerned with dps overall. The fact that you have to sit there and argue about whether or not healers should be contributing to the overall damage numbers proves to the simple fact that healers overall have lost their reason for existence. You can ask why this is and I would point squarely at the tanks. Two of the tanks have made it so that healing is utterly unnecessary, you can base this on the fact that two paladins have managed to complete the higher levels of content with no healers whatsoever. If it were necessary for healers to have a role in higher level content, this wouldn't be a possibility.

The problem with healers whining for additional dps abilities and possibilities means that they are not having to concern themselves with their sanctioned role, being that of the healer. If you take away the role of the healer from the classes that have little else but to heal, why would you expect them to do nothing else but whinge for additional opportunities to make themselves but a crippled dps class? If there was stricter and harsher requirements overall for healers to fulfill, they wouldn't' whine about having nothing to do. You can see whispers of this coming to the forefront in m4 and other raids but, as seen in the highest levels, they are overtaken by the raw healing potential of the tank classes.

It's not a lack of dps opportunity that keeps the healer classes at a disadvantage, even though there is only 4 people account for in any given group, or even 8 a raid. It's the fact that it is presumed that most healers are utterly inept at their given role and will routinely fail to meet the expectations that are given upon them. See the ones who are saying that esunaing a debuff/dot would be a dps loss. This fundamentally speaks to a failure of what the healer classes are meant to be and the fact that you are wanting to be little more than a green dps speaks to this. If you had more to do with healing and less to simply tending to the scrapes and bruises of other classes, than you wouldn't be whining about having nothing to do.

For whatever reason, Square Enix has decided that you are little more than a band aid dispenser, aside from the absolute worse case scenarios when everyone dies or multiple people refuse/fail to do mechanics, and that you will be relegated to your simple 1/2 button spam.

Again, it's not a problem of green jobs lacking dps opportunities. It's a fundamental issue with the fact that healing overall is, largely, unnecessary in the entirety of the game because it cannot be counted on that one person will be able to uphold the other three. This is entirely evidenced by the fact that two of the tank classes do not need healers whatsoever and, even then, for the other two it's arguable that they need healers altogether, given their propensity for shields and other forms of healing.