My guess? The world won't come to an end, but the goddess will.
She was likely supposed to watch over that world and protect it. But due to, frankly, incredible negligence on her part, things were slowly being pushed to the edge. The civilisations feels stagnated and on the verge of being destroyed. But not in the way that would end the whole world.
My guess is that other 'gods' aren't very happy about the Goddess and are likely on the verge of removing her. Forcing her to finally take some action, rather than just going hush hush over everything.
I don't trust her for even a split second. If she can seal memories, it would be a simple case of simply dealing away the traumatic parts rather than an entire life of memories, that way, the Reincarnator could at least be mentally prepared in some way. Hell, slowly unsealing her memories so she can strengthen her own psyche would be ideal, so long as she was warned beforehand.