Agreed. Rogue black holes, gamma ray bursts, or even the very fundamental constants of known physics shifting to a more stable form and that new rule propagati

Agreed. Rogue black holes, gamma ray bursts, or even the very fundamental constants of known physics shifting to a more stable form and that new rule propagating at light speed imperceptibly — and countless, countless other possible dangers. We are no where near the technological level to deal with these, as we cannot even deal with simpler world-ending events (meteor strikes, desertification, proper stewardship of emerging AI, nuclear war). In addition to all the other reasons one can muster, our advancement in technology can easily be motivated and justified by the objective of Earth preservation and propagation. It will be interesting to see, however, as we potentially discover other forms of life maybe in places we actually think are barren, how we as a species cope with that. But we are not even remotely at that problem space yet.