Here's another way to think about it: privacy and security are related but not the same thing. If you care more about PRIVACY, use Signal or Wire. If you care more about SECURITY, use Signal or WhatsApp. I care more about security, because privacy controls don't much matter if there's an exploitable vulnerability anywhere in the messaging stack. But you could reasonably argue that privacy is an everyday concern and security is a black-swan concern --- that is, when we're comparing Double Ratchet protocol messengers like Wire, Signal, and WhatsApp.