I did a quick over-look of the information on the site, but it looks to me that this is a pretty bad 'password manager' it looks like anyone can try to brute f

I did a quick over-look of the information on the site, but it looks to me that this is a pretty bad 'password manager' it looks like anyone can try to brute force your password based on the login/site combo. can someone tell me why i'm wrong here?