A (late) Beta generally gives you a good idea of the coming content, especially if said content is questing which is basically the groundwork of any expansion.
Mind you, we're not talking here about endgame related stuff, we're talking about fucking questing, content that is usually the first thing finished for an expansion in terms of gameplay.
Considering that i seemingly have to explain to a person who has been posting on this site nearly a decade that some people enjoy progression for its own sake in an MMORPG, then i think i'm not the one who's being obtuse.
Why do you think people farmed Ny'alotha until the release of SL?
Because they needed the gear to quest in SL?