I think it's important to remember that you can criticize someone's work while still respecting them as a person, as a creator, and acknowledge the good that they have done. No game is perfect in every conceivable angle. Every game has flaws. Every developer will tell you that there are probably a million things they wish they could do differently with a project. That's entirely normal. Good design is about owning those flaws and striving to improve on them, being transparent with your audience, and listening to what people think about your product. This doesn't mean you must make changes as they demand, but rather, acknowledge the problem and find a solution.

The people who care about you the most are the people who will call you out on your BS and love you anyway, not the people who will be polite out of obligation. The same is true for art and design.

Healer design is a problem. This is a factual statement and not an opinion. If it wasn't a problem, this constant back and forth wouldn't exist. It doesn't exist for Black Mage. It doesn't exist for Dancer. It doesn't exist for Gunbreaker. If the healers were in as good a state as these job, then it wouldn't exist for the healers either. But it does. If all people on the forums wanted to do was trash talk every job and every aspect of the game, then these other jobs as well as several others wouldn't be exempt from the same experience.