I'm one those healer mains (alongside all healer mains within my own social circle with varied degree of proficiency) that would actually groan whenever we get a WAR in our DF dungeon runs because we know we're not going to need to press more than 1-2 from our bajillion shiny healing buttons---sometimes NONE of them because there are some WARs who knows which order & when exactly they should press their bloodwhetting & other cooldowns. If DF que doesn't enforce a 1T1H2D compo I might as well beg to be vote dismissed so I can rejoin (lol) as 3rd DPS whenever I see WARs---I'm literally there because DF says I have to be.
Tank-Healer dynamic are being designed without the perspective of a healer main (It should come from both sides imho). Do they have no idea why do we pick up the role from first place? Have they forgotten there's this one role in their own game that in its nature interacts with party interplay more often than other roles? Why do they keep removing these interplay just because some booboo cries from their own or another's incompetence?
The reality is people just play at different skill level. Some are going to be suck. Some going to be mediocre. Some going to be flawless. And we're going to come across all these individuals---it's an MMO. Dumb things down and people will always find ways to be even more dumb. Do we seriously want to accommodate even lower after reaching certain point?
With all that being said, I'm not saying tanks should have 0% agency in the matter. The current status quo is ain't it however (shrugging off healer from 95% health boss can be funny/hilarious on a tank/dps perspective, but is absolutely miserable from the healer's perspective because you are playing the game for them, metaphorically speaking). And even if that came to be, is still not the magical solution because frankly healer issue is another whole can of worm that I'd rather not see being peeled at the moment. (much less in a tank sub-forum of all places!)
tl;dr giving Bloodwhetting treatment to 3 other tanks will remove what little vestiges (read: cookie crumbs) that currently remains on one from 3 major role in the game. Don't do that. Unless one day they just decide to rip off the bandage and nuke the holy trinity system out of the orbit lmao.