Because the law's notion of expectation of privacy is based off of the concrete reality of the tool, not of the abstract wish. If you're a well informed Tor us

Because the law's notion of expectation of privacy is based off of the concrete reality of the tool, not of the abstract wish. If you're a well informed Tor user, you would not expect coverage from the classes of attacks described. The Tor project itself specifically said that Tor does not defend against things like state actors.