I think we have reached a point where your analysis no longer holds up. I used to agree, but:
- The laws that govern legal search and seizure have departed dramatically from the protections afforded by the bill of rights.
- There have been multiple incidents of companies not disclosing extralegal "cooperation" with state actors such as the US government (and others)
- Warrant canaries are legal, yet big tech refuses to use them. Why not? Because using legal methods to improve user privacy and security are not considered "cooperative" enough.
- We have no reason to believe that governments are following the laws, even in the US. The recently revealed CIA scandal illustrates just how out of control things are.
- There is now a revolving door between big tech and state intelligence agencies, and big tech is becoming increasingly sympathetic to authoritarian candidates and hostile to third party or far left candidates.