The point is: the protocol encrypts a private key, a private key is an integer, or text hash. Saying that it is OK to build tools that encrypt text, like Matrix protocol, but it is not OK to build tools that encrypt private-keys-as-text is a slippery slope.

Which one is it?

- privacy is a right, and people should be allowed to share knowledge privately

or,

- privacy is not a right, and people should only be allowed to share knowledge if that knowledge is not associated with "value"