It has nothing to do with whether this particular technology is "safe." It has nothing to do with whether the technology "anonymizes" you. The problem is that it opens the door to social credit systems.
What happens if the government decides that you can't ride a bus, go back to work, or go to school if your phone doesn't give you a high enough "social distancing" score? This is exactly what they are doing in China.
China has a social credit system because they built the infrastructure to make it possible before they implemented it.
Part of it, sure, but what they have built (up to now) has not given the government the excuse to control public behavior for "public health." Sure, Google and Apple can see all the porn you've watched (if you don't take privacy measures), but there hasn't so far been a "compelling state interest" in using this information to restrict freedoms.
For the non-Americans here, "compelling state interest" is just Supreme Court language for "We think it's important enough to take your rights away."
Look up Project Nightingale. Pre-crime with medical records is next.
Don't make it easier for them to oppress and control you. Do not comply.
I agree that they haven't had an excuse to control public behavior for public health. I wonder what type of event will make them pull that card? I question if they ever would because as it stands right now they hold all of the cards and it has made a lot of money for many companies like Cisco and Salesforce among others.
The depth and scope of profiles created on people from information they have on everyone, with no digital rights or control by the user is troubling. Oracle purchased BlueKai back in 15', I will check out project Nightingale, see if you can look up Bluekai.
We are all a customer to 100's or 1000's of third party companies because a third party is always just a loop hole for every company to monetize users internet activity and attach digital identifiers to our real identities.
They are normalizing their capabilities (Google and Apple), in marketing that they are able to keep everyone safer by knowing where people are social distancing the best etc. This has been subtle but it sets a bad precedent. The groundwork has been laid in the boxed operating system of iOS and openness of Android.
I am waiting until July when tech companies have to comply with the CCPA for Californians. We will learn a lot hopefully from that.