@nprofile1q... Signal/Molly are a direct replacement for carrier-based calls and texts which are highly usable and work properly on GrapheneOS without issues. The purpose of the description is avoiding people thinking that the Messaging app is a secure way to communicate and pointing them in the direction of an easy to use alternative. The audience for the description are non-technical people. We also don't want to recommend something considered controversial there. It's just about educating people.