Please tell me why do organizations use canaries[0] then to tell people they where not forced to cooperate?

The funny thing is that I just read a bit of the linked Wikipedia article to find this: Companies and organizations who no longer have warrant canaries

  The following is a list of companies and organizations whose warrant canaries no longer appear in transparency reports:
  * Apple
  * Reddit
  * Silent Circle

[0]: https://en.wikipedia.org/wiki/Warrant_canary