Under what circumstances do you think it would be okay for an infected person to hide their contacts? Surely you’re not valuing your marriage over the lives that will be lost in the resulting spread?
This is an example off the top of my head, as other comments in this thread have explained, violence against people who have the virus is happening around the world and is something that must be accounted for in these protocols.
Edit: a link to a story from another comment (https://www.washingtonpost.com/world/the_americas/coronaviru...). I hope you can see that this technology can worsen this.