Yeah, but we're talking about the case where you also encrypt messages sent to others with your own public key. In that case you can decrypt with them your private key. And that's completely wrong. You can add yourself as a recipient, in which case the message will also be encrypted with your public key. You can also add as many recipients as you want to encrypt a message, at least with the reference gpg client you can. Some shitty PGP program you're using might not have that functionality. Seriously, where are these people coming from? Is this an LE disinformation campaign?