There have been a few healers that have expressed disappointment with FFXIV’s lack of care to healers. 

Xenosys, a Twitch Streamer, intentionally produced a video of he and his friends doing the first Dawntrail Dungeon at media tour without a healer. Healers thus were unhappy and reflected on FFXIV lifespan on their lack of attention to difficulty. Though, many of those healers in question do not actually do endgame content.