While this is not an issue imported from current WoW, because even in WoW with it's much higher frequency of incoming damage any halfway competent healer in that game is still dealing damage when it's sensible to do so.
It is still distantly related to a subset of WoW players.
The "Princess healers" from early XIV probably came from WoW and any princess healer in the current year is still stuck in that 2004 mindset, the only time where "healers only heal" was a real thing.
They basically want that vanilla WoW gameplay, where the peak of healer skill was spamming a downranked level 30-40 healing spell (probably why a lot of them still use Cure 1 at level 60+) and then standing around doing nothing when there is no incoming damage, to "regenerate their MP".