At minimum, it seems the kind of thing a competent lawyer would require.
Even if FB / WhatsApp doesn't currently have such a capability, there's no legal guarantee they couldn't be compelled to add it, thereby putting them in conflict with language that didn't include that clause.
Afaik, case law is murky over whether creating new code qualifies as speech (illegal to compel) or facilitating legally-approved wiretapping (legal and required).
Even if FB / WhatsApp doesn't currently have such a capability, there's no legal guarantee they couldn't be compelled to add it, thereby putting them in conflict with language that didn't include that clause.
Afaik, case law is murky over whether creating new code qualifies as speech (illegal to compel) or facilitating legally-approved wiretapping (legal and required).