Would you rather healers get more complex healing kits or more complex DPS kits?

[Doragan]

herp derp always been this way

It has. It literally has always been this way with oGCDs. Where healing mattered, which is raids and EX trials, the first, main, strongest, most spammable, most widely used, was Whispering Dawn. Sure, Adloquinum and Regen were used a lot. They were really strong, for sure, but in itself doesn't make GCDs the focus of healers in ARR, as most of the healing doesn't come from GCDs. You were, and I was, talking about healers in ARR there. And, surprise, in ARR, most of the healing comes from SCH. And where does that healing comes from..? Whispering Dawn. Ok, I hope I don't have to repeat that again.

You can have whatever last word you want, but the fact remains that GCD healing was the ONLY way WHM

I'll note you have not disputed that fact thus far. Therefore, you can't say it was wrong.

I have never argued that WHM, specifically, only used oGCDs to heal in ARR. Of course WHM in ARR is going to use GCDs in dungeons. That doesn't make healing as a whole in ARR GCD focused.
However, in any place where healing matters, which is EX trials, and Raids, the main and strongest by far, way to heal has historically been double buffed Whispering Dawn. Which is an oGCD.

It's perfectly ok to be wrong.
However, please go put back that goalpost where you found it, and keep it there.