[brirec]

It’s like using ssh-keygen to generate an SSH key, and entering your chosen password when prompted. This encrypts the private key, which is otherwise completely independent from the password. Not derived from it, just used to lock it.

[amelius]

I think that's just how you can implement it and not something that is incompatible with the commenter's post. They use a different meaning of "key" than you do, but that doesn't make it incorrect.