> I think it's a perspective worth considering. {Low-effort P2P encryption + low-effort forwarding} is a fundamentally different social value proposition than {Medium-effort P2P encryption + medium-effort forwarding}.

How can that be achieved short of outlawing all encryption, heavily enforcing it and then allowing encryption "for the good guys"? If you outlaw encryption on FB or WhatsApp, even if you somehow get Telegram on board ... if people care about encryption (which I doubt, but let's pretend), somebody will provide a low-effort solution and you can't really stop it.