I mean...the answer is that they probably just don't put in as much effort (thought wise or perhaps literally) on the Healer end of things. I think it's really just that simple. That and they probably don't read much Healer feedback. I mean, the feedback they responded to was primarily Tank and DPS complaints about healers. Like, they 'fixed' SCH taking up too much time waiting for aetherflow, but seemed not to give a kupo about any of the problems Healers actually had with their classes. They were apparently very confused and surprised that people were expecting a new Healer at all. That they were just so focused on balance was probably nothing more than a PR move. One that wasn't even original since they did the exact same excuse in Stormblood, where they messed up almost as bad.

I love healing, and I love FFXIV. That's why I want them to do a better job. It's really that simple from my end.