Gating interesting content behind artificial side leveling

[Seraphor]

There's casual in the sense of what content they run (not savage and extreme) and there's casual in the sense of how much time they have to invest in the game. It sounds like the content is not for casual difficulty-wise, but is gated behind content that is not for casual time-wise. So the two axes are not really related, and this is yet another way for them to force people into Eureka, because the one bit of content that's worth doing out of this mess is at the very end of a long haul that people otherwise wouldn't be touching with a stick.
This really isn't comparable to "clear Savage before running Ultimate" because if you're not the crowd that runs Savage, you have no business in Ultimate in the first place. This isn't the case and Yoshi himself set Eureka and the dungeon apart in that last quote Nora brought

So what you're really saying, is that those who want a grind, the non-casual-time-wise, who Eureka is intended for, shouldn't get anything interesting at the end of their grind, because the casual-time-wise will get jealous?