This means that you can securely unlock/ recover your private key with just passwords.
How does it work?
You mean you can just recover your private key only with a password without email or something to receive the private key?
If that's the case our wallet is at risk if we use that wallet. Because they can easily manipulate and brute force your wallet and generate a large number of passwords and retrieve all of your private keys from the website database.
So for me, I'm not satisfied with this kind of recovery method to get the private key because it is not secured anyone can put any random password to get the private key. They should required email or any contact for recovering the private keys.