I wouldn't even call that a demand. Just your proposed solution. It's pretty obvious I disagree.
I'm playing FFXIV because I enjoy the game. The form its monetization takes is minor as long as I enjoy the actual content. And I'm saying that you're asking for an increase in the base sub to wrap in what is considered an extra into the main game. Rather than the choice people currently have where they can decide whether all this extra stuff is something they want. This isn't content that would have been created unless there was demand for it, but it also allows players to CHOOSE whether they want to participate with that or not.
ALSO.. F2P and B2P games generally cost hundreds if not thousands of dollars a year to stay "competitive". The cost is usually hidden in the fact that the whole game is micro transactions. FFXIV is entirely accessible except for a few cosmetics. There is no functional limitation as long as you pay the sub. So again, you're asking others to pay to cover fancy extras.