Obvious solution?
Turn away if spoilers bother you coz here they come.
As far as I could tell, the planet being destroyed was an unfortunate side effect of the birth of a "god", not a necessity for its birth to take place. If that's the case, couldn't Circe have just transformed the god and all the other gods into smaller beings so they could be born without destroying the planet? It even seems like they'd have technology that could achieve this, or assist with it if the task was completely beyond her powers alone.
Idk, is there any good reason they couldn't at least try this? Am I missing something?