Comment by knallfrosch

1. Meta can read the metadata perfectly well (who communicates with whom and when), which is enough for ads. 2. Meta doesn't want to be able to read messages, since it's a PR nightmare when doing so. Case: Ordered to do so by a government agency. People could switch to Signal. 3. Data isn't readable "in transit", since it's encrypted with HTTPS. Only Facebook servers could read it if they wanted.