What is your proof they don't have a duplicate key that also unlocks it? A firm handshake from Tim?

> Apple's solution is iCloud Keychain which is E2E encrypted, so would not be revealed with a court order.

Nope. For this threat model, E2E is a complete joke when both E's are controlled by the third party. Apple could be compelled by the government to insert code in the client to upload your decrypted data to another endpoint they control, and you'd never know.