1. is still irrelevant. The point is people can adapt EITHER WAY. Just because one is easier to adapt to doesn't mean people can't adapt.
2. Yes it can. The point is whether or not people CAN adapt not if they WILL or if they will have an easy time to adapting. That was never my argument. And I said as such. And again, it's not gonna matter in lower level content because SE purposefully makes it so it doesn't matter. Meaning if a person doesn't want to use the extra dps options to make a boss in a dungeon go faster, no one can make them and if they get harassed and I'll misquote myself again: that is what the report button is for.
In content that it DOES matter - EX and Savage it's already expected of you.
3. The only thing in recent memory that made things harder was this current savage tier, because SE decided to up mitigation requirements that the rest of the party had to deal with (because healers don't have things like addle and feint) and had 0 training with else where because SE can't scale content properly. Or rather, they don't want to.
SB level of difficulty isn't too much to ask for.
You keep saying we're arguing to change all the healers for nothing more than enjoyment, well personally I think you're wanting to keep WHM the same for no other reason than enjoyment yourself. That's fine and all, but you can't say we can't use enjoyment personal or not when you are also doing the same.