1. If those space-cities aren't self-sufficient, they're a terrible pain to maintain from the surface; and if they are, well - they don't really need us gravity-well people all that much.
2. The universe doesn't need Trillions of people exploring it, thank you very much. (Unless you subscribe to Leto II Atreides' Golden Path, that is.)
2. The universe doesn't need Trillions of people exploring it, thank you very much. (Unless you subscribe to Leto II Atreides' Golden Path, that is.)