Biounique id is an advertiser’s wet dream and I don’t think it’s theoretically possible to prevent it from being exploited for profiling by Google. If the hashed encrypted token retains the uniqueness then it points to you as an individual across time, devices and location changes. There is no escaping this ID. You can’t change it, you can’t get a new one.
Google and other multinational corporations WILL know where you live and can figure out all your personal characteristics with a little time. Your anonymity is gone forever.
Sam Altman saw the film Minority Report in which iris scanners on holographic billboards trigger the advertisements to address you by name, hampering the escape of the central character who was being set up, and thought “Cool, let’s make this. I’m going to be rich! The other dystopian aspects of the film are fiction, but this one I can make real.”
If the biometric ID is collected and stored by someone else, not only have I lost my anonymity, I’ve also lost control of my identity and there’s no way for me to stop that happening.
This is unequivocally bad for privacy.