Yeah, that's a concern of mine too. Looking deeper at the description, looks like he describes a passphrase-like "local password" on the "The user's view of the application" page [1]. Hopefully that would address that issue (at least as much as passphrases do for SSH keys).

(And no problem. If we were forced to comment using only precise terms, with no simplifications, comments would either be ridiculously long or nonexistent.)

[1] https://www.grc.com/sqrl/userview.htm