What would prevent 0/1 Healer clears of content?

[Renathras]

What on earth does...

Good holy GOD if you would stop putting words in my mouth for one single second you might actually be able to get a productive discussion going. I wasn't strictly even talking about HEALERS since this is a problem of all roles in the game right now.

Indeed, but is that really relevant here or are you just trying to downplay the point?

It's relevant as it points out that this is nothing new in this game, and the only reason it took so long then was likely a lower level of player skill, not that it wasn't possible at the time or that the design of the game/Healers has devolved since then. And people WEREN'T complaining about it back then.