Being able to read replies on twitter reminded me why it doesn’t matter if you can’t read them

That’s exactly why a law like this wouldn’t make sense, even if you don’t care about privacy.

To enforce a ban of encrypted messaging, any software capable of encryption would have to be banned. Next step almost every existing operating system would have to be banned as well.

There’s lobbying on both sides

If you leak one of the 2FA codes, especially together with a timestamp, in theory it allows someone to brute force the seed, since they now have one known plaintext. If you leak multiple, it reduces the amount of time needed to do that.

It does not matter how good the encryption is. The app on your device has to be able to decrypt the content to be able to show it to you. If it has access to the decrypted data, it could just send it somewhere. If it has access to your private key, it can leak it. Even if the app is open source, you do not know if the binary on your phone matches that source, unless it uses reproducible builds and you actually verify the binary on your particular device, after each update.