1. It's a very small community and peer review is even hard. Think about it this way: what do you think two physicist colleagues talk about at a conference? How do you know who to talk to to collaborate on a problem? (Yes, people still talk voice about problems.)
2. Labs are specialized. You choose a lab to work at based on what they're working on. How are you going to choose where to spend your Ph.D or postdoc if you don't know what the lab is working on and how productive it is?
3. We are all still humans. We are wired to know the social systems around us. This would be an entire charade.
Ok, then scientists can form groups where they know each other, but publish anonymously outside those groups.
It doesn't solve all the issues, but it at least allows scientists to be "activists" (really just share their opinions like any other human) without affecting their credibility. Even if they're doxxed, they can eventually regain anonymity, because eventually other scientists with different views will publish papers on the same subject, and people can only distinguish who published what by its content.
Right now, scientists can share their opinions anonymously. This works well enough, except they can't share them in-person except to others they trust; and if they get doxxed, they can't remove their old posts from the name on their papers.
2. Labs are specialized. You choose a lab to work at based on what they're working on. How are you going to choose where to spend your Ph.D or postdoc if you don't know what the lab is working on and how productive it is?
3. We are all still humans. We are wired to know the social systems around us. This would be an entire charade.