Not trying to be cynical, but to me this seems to be a way to get the mass public "okay" with contact tracing. Then somehow they "mysteriously" manage to get more accurate information from other sources (location, wifi beacons, data sharing etc).
But they'll just say "the information is only from this source, we pinky promise!".
But they'll just say "the information is only from this source, we pinky promise!".