

how would they prevent me using a chat app they can’t look into?
I dont think they can, unless they get android and iOS to do this os wide. The bigger problem is: will the public care enough to use such a messenger? Will they do it when it becomes illegal to use such a messenger? If not, mass surveillance is inevitable and those sidestepping it for important privacy reasons are easily detectable making them easy targets.
Pretty much every messenger is built around a central server. Tracing connections to that server is not without hassle but doable with government resources. Now, a Briar-Style P2P Network could work but that has it’s own problems. Central servers are popular for a reason.