Yeah, but who is "we"? If power structures on Earth keep growing and working hard to sink their fangs deeper into anything that could challenge their power, I'm not really sure people, or even machines, just moving off to live as they please elsewhere will actually be a thing, not if it can be avoided. That's just not in the spirit of things as they are currently going. Oppressive empires aren't keen on letting people escape and regroup elsewhere. On the other hand, sometimes they can't help it, so here's hoping.