Two things I agree with: AGI looking at us the same way we look at a cat or dog. And secondly AGI correctly deciding, as it should, that we need Earth more than it does, and so it will head out to some other planet.

AGI isn't as biological tied to Earth as we are. Doesn't need oxygen, isn't as affected by strong G forces, can withstand extremes in temperature and the list goes on.

It will make another planet(s) home and from there build an an AI civilization.