Laura’s answer to “it seems that both the gray stone eater and Hoa want the moon back. And that’s what Alabaster wante…” > Likes and Comments

that's interesting. I don't know if I have the same takeaway based upon that one sentence you quote.

The gray stone eater originally said that he didn’t want to open the obelisk gate. Then it says he does want it open. It also said that he wants the Season to go on forever so humans can die off. So why would he want the moon back? This part is VERY CONFUSING.
From chapter 18:
Hoa warns Essun that the gray one wants the obelisk gate opened for his own reasons. Not to end the seasons and bring the moon back.
From chapter 16:
They ask what the gray stone eater wants.
“He wants to make sure the Obelisk Gate is never opened again.”
“The what?” Ykka asks. But you’re leaning your head back against the wall, floored and horrified and wondering. Of course. Alabaster. What easier.
way to wipe out people who depend on food and sunlight to survive than to simply let this Season wear on until they are extinct? Leaving nothing but the stone eaters to inherit the darkening Earth. And to make sure it happens, kill the only person with the power to end it.
And from the final chapter:
“The path that the Moon naturally follows. Instead of letting it pass again, lost and wandering, bring it home. Father Earth’s been missing it. Bring it straight here and let them have a reunion.”

“It will be a terrible thing,” Steel says softly, nearly in her ear because he’s moved closer to her. “It will end the Seasons. It will end every season. And yet… what you’re feeling right now, you need never feel again. No one will ever suffer again.”

So Nassun turns then, to Steel, and says, “Tell me how to bring the Moon home.”

Isn’t this all very confusing?

I think we definitely have a case of "unreliable narrator" on our hands--the motivators change depending on who is telling the story. On one hand we have Gray possibly lying to Nassun and on the other we have the details as Hoa and Alabaster see them. The truth is likely somewhere between the two.