It can be depressing to know, how less needed healers are, yes.
My tank Partner and i had maked fun about it, that whe had to clear EW bosses of the 90er dungeon very often only with two people. Because healer and other DD died.

But, for the whole picture is it good in my eyes.
It reduce the responsiplity and stress of the healer, to play completly right. It allow the healer to make mistakes, without the risk, that you alone (or two Player alone) are the whole reason for a wipe.

Yesterday by the last new raid have whe wiped around 4-5 times, only/mostly, because both healer died at the same time. And there was no one who was able to ress them (give more classes this option, like in Eso). It sucks, that one/two Player alone are so important to the whole group.

Yeah, they could give the healer more work, by using more aoe attacks again the player. Or using more tank buster. But, it would suck for the Black mage. Because, he can not take much dmg (i dont know much about the white mage durability, because i use the scholar more, as a healer. I like barriers, who prevent dmg, more, as having stronger healing power). And can easily die by unavoidable attacks. When he dont has his shield ready or max Lp (and, he isnt much of the prio list of healers).

And, healer have enough to do, before the group reach a boss in the dungeon.