What's the point with that quite lackluster story in Endwalker?

[Silvarer]

I remember when I first got to the moon, I thought I was already at the end of the game. The way the game was advertised in addition to the events leading up to that point, I thought the moon and Zodiark were supposed to be the finale. Very confusing.

They were just using misdirection is all. Make us believe one thing in order to keep the real final area a secret until the end. I thought it was quite effective.