I disagree with that take on healing.
It's one thing to argue that healers should DPS when they're not healing and that their DPS kits should be more involved than one-button spam. That, I agree with. It's quite another to treat healers actually pushing a healing button for a GCD as some sort of burden that the game needs to design around. That's precisely the interesting question: is the
party's continued DPS best served by me throwing another stone or by me casting a heal?
I might even go further and say that WHM shows how
not to "refund damage." The goal should be to reward thoughtful, necessary use of an ability, à la SGE's Eukrasian Diagnosis or DRK's Blackest Night. Finding an optimization for feeding the Blood Lily when everyone is at full health just feels silly.