The person who wrote the proposal[0] is from Google. All the authors of the proposal are from Google[1].
I've been thinking carefully about this comment, but I really don't know what to say. It's absolutely heartbreaking watching something I really care about die by a thousand cuts; how do we protest this? Google will just strong-arm their implementation through Chromium and, when banks, Netflix & co. start using it, they've effectively cornered other engines into implementing it.
This isn't new to them. They did it with FLoC, which most people were opposed to[2]. The most they did was FLoC was deprecate it and re-release it under a different name.
The saving grace here might be that Firefox won't implement the proposal.
[0]: https://github.com/RupertBenWiser [1]: https://github.com/RupertBenWiser/Web-Environment-Integrity/... [2]: https://news.ycombinator.com/item?id=26344013