No, the tool works like a brainwallet. The seed phrase determines the ethereum public and private keys. That way there is nothing else to save, no file backup is necessary. Knowledge of the seed phrase is sufficient. That's a feature, not a bug.

It is not like gpg where the private key is independent, stored on disk and encrypted by the passphrase.

The user messed up in that he didn't understand that he needed to use a strong passphrase or it was possible for anyone in the world to guess it.