First let me clearly state that I appreciate the amount of thought you guys are putting into creating better systems that have high privacy guarantees. I concede to you, that in some situations, your system leads to better privacy.
But I don't look at this on a purely technological level. These identity-based systems are instruments of control. Right now everything is still in flux with how these tools will be used and how accessible they are to the general population and the many minorities therein. I simply don't trust our politicians to do the right thing short-term and long-term. The establishment of the GDPR has been a major victory for better privacy legislation and now the Commission wants to hollow it out. The Commission also wants chat control to increase the amount of mass surveillance in Europe.
There is a potential future, where we all win. But I am highly skeptical, that in the current political climate, we will end up there.