I think this discussion has gone way off track.
The whole point of the App is to assist tracking teams to contact people who may have been in close contact with someone who has been diagnosed with Covid 19. Now it is fairly easy to contact for example, family members or close friends who you have been in contact with. However, it is not easy to contact someone you don't know, such as the person you sat next to in the airport lounge, at a football game or a restaurant. This is the whole reason for the App, to locate these unknown people and stop the spread of the virus.
I am also a medical professional, and my wider family have all downloaded the App, it is so essential to help stop the spread of the virus, please don't take this issue lightly. And as we do know you are more widely tracked by Google, etc, than anyone else. So for the health of you and your family PLEASE do the right thing by all your loved ones.