I think this is an unhelpful suggestion. It seems to me that you're advocating that the developers take an approach which will give them a smaller install base in favor of engineering focus on privacy and security. But communicating privately and securely with someone is impossible if they aren't also using the app.

This is the same problem with PGP/GPG -- it may be incredibly secure, but if no one uses it, it doesn't matter.

Obtusely refusing to use a good system which has broad appeal is working contrary to your own goals.