I don't disagree that
many people play this way. However, many do not.
Ask Jonny Casual if he's thinking about the difference between a lost Glare or a dead DPS doing more damage than him when he casts Cure 2 or Raise and he will look at you in utter confusion. "When someone's dead, I Raise them. That's what healers do. When someone's damaged, I heal them so their health bar isn't as empty and they aren't as likely to die. That's what healers do."
The buff to Misery wasn't "players would not use lily healing for any other reason". It was "high end raiders trying to maximize their parse or clear tight Enrages would not use lily healing for any other reason". And it wasn't even true of all high end raiders. People were using Lilies before the change. Some where just complaining about it. A lot.
I think part of the problem with the language barrier here is you
are accurately describing a portion of the player base and gamers in a more general sense. The problem isn't that you aren't accurately describing that part. The problem is you aren't accurately describing them/us all as a whole. You're describing a part and then extrapolating that part's view onto the whole, leading to confusion and a difficulty to understand and reconcile the disconnect when you run into someone that is from the part you aren't accurately describing. It also seems to cause you to believe the part you're describing is either the whole or at least such an overwhelming majority as to be functionally equivalent (in terms of how the game should be designed), when we don't actually have evidence to support that and, at the very least (again, the Lucky Bancho numbers:
https://i.imgur.com/t6eJLaj.png ) have evidence showing a significant portion of the player base (at the very least a large minority) doesn't fit into that.