Te gameplay of healer is intentionally designed to be based around ogcd's.
Pretending that your rotation is 1-1-1-1-1-2 when it's really:
1-2-1-1-1-1-1-1-1-1
-3-34-3-4-5-6-7-
etc etc. is really disingenuous. The only healer who doesn't adhere to this well is whitemage. They have very few ogcd's in place of their afflatus spells.
Besides you use GCD healers a ton more than we ever did in endwalker's ex1 and ex2. Just watch a video of those if you need a refresher.