I think the issue some people seem to be missing in this discussion is that the technology is morally neutral.
A system designed to protect the privacy of its users' data even if its operator is subjected to coercion does not care whether the coercion comes in the form of a court order, a bribe, a threat to reveal a secret or a man holding a gun to the operator's head.
A system designed to be secure against coercion of its operator necessarily resists lawful intercepts just as it resists blackmail. Designing a system in such a way does not imply that the designer wishes to promote illegal behavior nor hinder the ability of the police to investigate it.
A system designed to protect the privacy of its users' data even if its operator is subjected to coercion does not care whether the coercion comes in the form of a court order, a bribe, a threat to reveal a secret or a man holding a gun to the operator's head.
A system designed to be secure against coercion of its operator necessarily resists lawful intercepts just as it resists blackmail. Designing a system in such a way does not imply that the designer wishes to promote illegal behavior nor hinder the ability of the police to investigate it.