I tried to figure out its identity model and failed, and I consider myself somewhat familiar with encrypted IM protocols. How should non-technical users ever fi

I tried to figure out its identity model and failed, and I consider myself somewhat familiar with encrypted IM protocols. How should non-technical users ever figure this out? And if they don't need to, and it just works as a regular encrypted messenger: Why should somebody use this over any of the many alternatives? Other than that, its "advantages" page looks highly disingenuous, e.g. by describing Signal as "Possibility of MITM: Yes", but itself as "No - Secure", with a footnote of "Verify security code to mitigate attack on out-of-band channel". How is that different from verifying a Signal verification code!?