The idea is a healer with comperable dps output and healing output to the other healers, not being over or under powered in either respect. I'm not sure where this cognitive disconnect is coming from.
Think of dpsing on this theoretical new healer as it's version of Aetherflow. You can play SCH in casual content without Aetherflow I guess but it's going to suck and you're making your life much more difficult since Aetherflow does things like give you access to more potent and varied heals and restores your MP.
You could play this healer without dpsing but by doing so you would lose access to some portions of your kit because you wouldn't have the resource (whatever it might be charges/gague/potency/etc) to do nearly as well.
Literally a healer with "I need to do damage" as it's gimmick. That's all people are suggesting. Not "I do more damage and less healing" or whatever you guys are getting caught up on.