Except the original question by Recon1o6 in the endwalker questions wasn't just about the healing difficulty but the monotonous spam of Dosis / Broil / Glare / Malefic. In actuality, doing challenging content like Ultimates and Higher end raids like Savage doesn't solve this problem at all. It makes it worse because healer DPS starts becoming essential and mandatory to beat Enrage. The actual question of 'can you do something about making me press the same one offense-oriented DPS button over 100+ times in an encounter' was never answered.
Shifting content to be easier is fine. However, the higher you go, the more healing tools you get. The more healing tools OTHER jobs get. You actually heal less the better you get accustomed to a fight - even in normal modes. Gear makes it so you heal MORE per skill, but it also makes it so so you have to use LESS healing skills to get the same effect, and spend more time on DPS as a result. There's just so many ways a healer is largely discouraged from healing that they start feeling more and more like a DPS... but instead of pressing buttons, they're playing 'how many times can I press 1-1-1-1-1-1' simulator.
If you can tell a tank to lose their entire DPS rotation because all they need is one button to establish aggro for every expansion and 50+ mitigations instead to do their job. Most will cry foul immediately. It really is just that simple. How is that acceptable for one role and not the other when both roles require situational awareness and have their own things outside of just DPSing?
The real problem is that the devs can give more DPS skills to the tanks, but they can't do that for healers? When it was the tanks who got more healing tools for the party in addition to extra DPS tools? When the DPS also get a bit of mitigation tools? They're suddenly juggling more responsibility ... but healers suddenly have to be either a complete beginner or an Ultimate player?
Where do people who know how to use their toolkit stand then? The ones who are average at the game, want a bit of safety net, and GCD heal a couple of times, but still have more than 10+ seconds to DPS immediately after?
Not even including the fact that higher level content generally requires a party and has a smaller pool of players - which means it's not always accessible for your specific time period, the more difficult content is still the same 1-1-1-1-1.