Again: the Venn diagram between people who want encryption and people who need encryption has very little overlap. And, thankfully, modern secure messaging systems work for both populations.
Which also applies to the distributed systems - email, in context of this particular discussion. Same logic here: email works for both.
And doesn't apply to IM systems, because it's just not possible for Whatsapp user to contact Signal user and invite Wire user in a group. IM app fatigue is a real problem. Or maybe it's just that nearly everyone in my bubble has load of apps just to contact all their peers.
> Which also applies to the distributed systems - email, in context of this particular discussion. Same logic here: email works for both.
Email yes, encrypted email, no. That's the whole point. A decentralized system, as nice as it is in theory requires participation to enable widespread change. You cannot just say "now we all encrypt email" and know that everyone does. But you can change the transport mechanism of a centralized system to something encrypted and know that it works for all participants, even for those that don't care or don't know how to do it themselves.
It's a trade-off. Again.
Average Joe is perfectly fine with just "100% secure" label. Add some "military grade hurr durr" nonsense (okay, maybe it's a bit outdated buzzword) and Joe's even willing to pay for it. No need for any actual security.