While I understand your point entirely, I'm gonna repeat what I posted a long time ago in one of those countless "I don't wanna DPS" healer threads.
Healing in FFXIV is DPSing, as is tanking too. I understand what you mean with people wanting to play their preferred playstyle, I really do, but FFXIV doesn't really offer different playstyles, because the game is SO streamlined that all classes have the same final purpose, regardless of their role. There are no builds here, there are no alternate gear sets, there is virtually no variation at all in how a job can be played, because the game is designed that way. You can argue that the devs didn't intend healers to DPS or whatnot, but the tools are there, the way the fights are designed, the way tanks are designed, the power of the healing spells, etc, etc, etc. Fights are even scripted, so there's absolutely no variation to how a job is played other than what cooldowns are used at what specific timings, and even that can be argued to have an optimal execution.
This is coming from someone who loves to heal. I love stressing out as I look as HP bars in the party list go low and keeping up supportive buffs with short duration and etc etc etc. But that's not FFXIV. I used to hate the healer DPSing meta, but as I kept playing and learning more about the role, I came to like DPSing because that is how you play the game to the fullest. That's the real skill ceiling, and now that I see the game for what it is, I thoroughly enjoy DPSing as a healer and push myself to do so, because it means I'm good at being a healer in FFXIV. The game is objectively not designed to have pure healers, it is not a community thing.
Again, anyone is 100% free to not DPS as a healer at all, but all that is doing is basically ignoring the game's design. If you really want to only heal, then FFXIV really isn't the game for you.