For a video talking about the jobs having a rhythm, it's quite insulting to see the White Mage icon being predominantly displayed in the thumbnail.
You see, healers don't get to have any sort of rhythm for their DPSing, and since downtime happens for 70-90% of most fights, you'll be pressing nothing but one button (Dosis/Glare/Broil/Malefic), over and over and over. All else you'll get are some sprinkles every 30-60 seconds (like the one DoT, Assize, Cards, etc.).
Sure, it's cute that Sage gets to press two buttons to cast shields, but how many times are you going to use them when you have a plethora of oGCDs that will mitigate a similar amount, if not more than the shielding? And after that? It's back to Dosis spamming.
Astro is the only one that falls off the norm and gets to press more than one button during burst phases, but that's only every two minutes. And after that? It's back to Malefic spamming.
What I'm trying to say is simple: if FFXIV has the "special sauce" when it comes to job design, then they decided to deliberately make healers as flavorless as they possibly could.