My honest opinion:
They literally have no idea what to do.
The job design team is understaffed, overworked and beyond dry on fresh ideas. They've burned themselves out trying to get the DPS and Tanks in some semblance of shape and there's nothing left for the healers. I don't think they have a stance because they've simply not had a window to actually work on them and frankly, it's at the point where I don't think they actually have much of any interest on working on them either.
Wow, Seb, y u so salty? How can you claim this? I hear you ask. It's simple, each expansion has bought impactful job reworks combined with additional jobs to be introduced. The job design team meanwhile has remained tiny from ARR to this day and healers have repeatedly drawn the short straw both in terms of gameplay attention and perhaps even more seriously, QA.
The fact that they keep making the same mistakes over and over is just getting dull at this stage. Numerically, healers are actually pretty fine at the moment. However the struggle of finding good ASTs and SCHs attests to how horrible they are to play at a high level.