I'm not really sure what you're saying. It looks like you're humorously drawing attention to the fact that the user considers the app to be extremely good and just lacking one nice-to-have feature (encryption), whereas you believe that they have misjudged the importance of that feature and it is, in fact, essential?
And, just to guess, he's also pointing out that security is not a feature that can be "bolted on" to a chat app later. Secure messaging is an incredible deep space, and any attempts to add security to a chat application will have far reaching implications on features and usability.
