Here's the part I think you're missing. In any player-base for any MMO, you will always have people who are unhappy. You can't please everyone and you'll shoot yourself in the foot trying.
Do I think healer could use a little spice? Absolutely. Do I think Sage and Scholar have too much overlap? Absolutely. Do I think this is going to ruin the game as a whole or cause lots and lots of people to just mass exodus from healing? Absolutely not. And if you personally make that choice not to heal, sure, that's on you, but you're not doing anything by making a hashtag other than self-gratification.
Ultimately healers don't have a very engaging rotation because they're supposed to heal. They made the choice to balance the game around harder content, making it so that casual content, healing isn't required nearly as often. I do think some stuff needs adjustments. Endwalker is kinda weird because the trash pulls in a dungeon actually hurt but bosses don't. It doesn't make a lot of sense to me. Warrior's self-sustain is absolutely ludicrous in a normal dungeon. They could probably tweak that a bit and make dungeons hurt more, even though they have made the choice to place the majority of their focus on the hardcore content. But they didn't.
But I'm just saying, you all really are coming off like you have some kind of god complex about playing healer. Like if you don't hold the constant and ultimate authority on survival and death, you aren't satisfied. I don't think that's the experience they want players to have, especially because healers and tanks already get by far the most feedback during their gameplay. You can tell if a healer isn't healing, a tank isn't using their mits, but it's a lot harder for players to be able to tell if a DPS isn't pressing buttons in the correct order. As it is, the most common feedback I've ever heard in /novice is the reason they don't want to heal is that they don't want to be responsible for the party wiping because they screwed up.
Put simply, they seem to want healing to be at least approachable for new players. That means make it simpler/easier for casual content. But they have acknowledged the regular gameplay is a bit too easy and they want to ramp it up. That's probably why mits are getting such a huge buff in the new expansion. Sentinel and their equivalents being increased to 40% and given extra effects leads me to believe they expect us to have a need for that level of mitigation... so perhaps, in Dawntrail, more pain is coming out so you can enjoy healing it. I'm certainly looking forward to it, as someone who plays a lot of Scholar.
But at the end of the day, the game isn't ruined by healers not being able to stroke a god complex, and you're all being incredibly hyperbolic.