Braindead jobs see way more play than complex ones. Square knows this; it's why they keep dumbing down jobs for mass appeal. It's happening to dps jobs now as well.
The trend has only continued in this direction. I seriously doubt they're gonna make a complex healer. If they did, it'd just wind up like AST, "unique" for one expansion and then beaten down until it's just another basic bitch. Remember when people thought SGE would solve the healer problem? lol. lmao.
Saying this as someone who only healed for a straight year in this game, just give up and play something else. The devs have chosen their path, and the destination is snoozeville. Also if I'm being real, even in basic dutyfinder dailies I'll watch people die because they weren't esuna'd. I really get the sense that anyone who gave a shit about this role has abandoned it, and the only people left are just in it to hit 1 button all day long.