You are misunderstanding how this works.

The password hint isn't a hint to remind you of what your password is. It is a "code word" to verify to us who you are so we know it is ok to send you your password. The two are unrelated.

For example your password could be the phrase "red letter" and your hint question could be your mother's maiden name. If you lost your password you would come to the site and click "forgot password" link. There we ask you for your username and then prompt you for your mothers maiden name. If you get the answer correct we know you are who you say you are and give you your password.