This makes total sense, and good of them to warn you. MANY people tie things like password resets to your email, not to you and may not have a retail store pre

This makes total sense, and good of them to warn you. MANY people tie things like password resets to your email, not to you and may not have a retail store presence you can get to for a password reset. He's telling you - once this email is gone, it is gone and no one, including you will get it again. That is good in the sense that no one can impersonate you, but bad if you have an "ooops" moment and want to do a password reset that needs that email.