Dissidents need the ability to conduct private conversations to reduce the ability of the government to silence them.
Take the example of the Black Panther Party marching into the California State Capitol with shotguns. Under the laws of the day, it was perfectly legal. There was no intent to break any law. Yet, had the authorities been able to determine that they were planning this, they would have been stopped.
Private communication is essential to the planning of public discourse.
The government silencing protest is the problem there, not a lack of privacy. Dissidents don't have that need if society and government allow free expression.
Take the example of the Black Panther Party marching into the California State Capitol with shotguns. Under the laws of the day, it was perfectly legal. There was no intent to break any law. Yet, had the authorities been able to determine that they were planning this, they would have been stopped.
Private communication is essential to the planning of public discourse.