The grass is always greener elsewhere.

Some games where healers are powerful in every way but direct damage have players complaining of being healbots and/or buffbots since attempts to keep buffing classes active usually involve having them hit the same buttons every 30 seconds, 2 minutes, or what-have-you.

In games where crowd control is powerful, you might end up with some CC classes that are incredibly desirable but a horrible pain in the ass to level without help since their game-breaking CC is balanced by their tedious or non-existent damage capability.

Then we have FFXIV, where some players complain that they don't have enough healing actions to do, but don't care to hit stuff.

Don't get me wrong; I think there is room to improve the healing and overall support dynamic, but we're not starting from a horrible place. Could be a lot worse.