I have to say that the lack of a DPS rotation or any variation in abilities also really hurts my personal enjoyment playing with a Healer through the story. In Solo duties, it is just pressing the same button over and over again after all, imagine fighting the final fight of Endwalkers Mainstory as a White Mage. It generally makes all solo player content as a healer boring. If anything Healers in FF14 proof that it isn't enough to ramp up the dps so that you can kill stuff solo, you also need to have some tools to keep it exciting.