Grinding the same dungeon over and over =/= progression
playing POTD over and over =/= progression
spamming buttons on the placard =/= progression

however...

playing through raid tiers with your FC = progression
trying to clear every extreme trial synced = progression
making gil on the market board is still a bit of a grind but still = progression
playing through the MSQ = progression
and ultimately, playing the things about the game you enjoy = progression

Maybe you have a differing view on what the word 'progression' means to you, but grinding a class/job by doing the same thing over and over is not the only part of an RPG, especially not an MMO RPG.
While in single player games, its more about the journey, in MMOs, leveling is about the end goal, not how or what you do to get there. Regardless of whether or not I choose to buy the skip potion (still deciding), if there wasn't enjoyable end-game content waiting for me at the end of the grind, then why waste time/money leveling to get to that point?
Imagine a game where the only part of it was slowly leveling your class/job up and that was it. Nothing to use that job in. No story, no end-game content, just leveling. Maybe you'd like that, and if so that's alright, but at least in my opinion, that's not a very good payoff for all that work.

This is mainly my own opinion, and maybe I'm in the minority here, but I haven't seen anything to indicate that yet.