I still think you’re right though. The better plan is staying on earth. The trick is moving it outward as the habitable zone expands with the sun. Only have to convince humanity to sling a giant meteor just outside earth’s orbit every year for millions of years without messing up. What could go wrong?

Mother Gaia refers to the Earth, not the sun.

An asteroid/comet impact big enough to wipe us out is a statistically certainty - not science fiction.

Unless you're willing to exterminate people who don't comply, the incentives are such that maintaining the status quo will give economic (and military) advantages.

Besides, over long time scales there's more to fear than a few degrees of climate change.