Consider Keith's insight on entropy and dice rolls. For security, multisig is often safer than relying on passphrases alone.
I would argue it’s always safer. A passphrase is either short enough to remember and likely easy to brute force OR long and secure and your single point of failure to lose your funds when you can’t reproduce it. Or your trust a password manager, which is maybe okay as long as you have a back up plan for that too.