What is happening
FileVault on APFS uses volume encryption integrated with the Mac security model. An authorized user password, personal recovery key, institutional key, or organization-managed escrow may provide access. Apple silicon and T2-equipped Macs tie internal storage security more closely to the logic board and Secure Enclave. A valid password cannot repair unreadable NAND or damaged APFS metadata, while a perfect storage image remains encrypted without the correct unlock material.