As things are, you want to cast these 15-22 times per minute.
How would you feel if you only cast it like 2-3 times per minute? You'd turn it on, and your character would get little windows where they could move or ogcd without interrupting, but it would be auto-cast unless you clipped it too much.
You would be touching your keyboard much less, but the relative diversity of the buttons you actually press would greatly increase. You would not actively be droning on. Just passively. And, for those stakeholders who hold so much sway who are so concerned about overwhelming healers, we would actually have less to do: all the while likely increasing healer offensive performance.
(Even if recent attention has emboldened those dissatisfied with the healer direction, Yoshida is holding firm for now. Given that, turning the nukes into stances seems like one of few realistic ways to make healing less monotone.)