An interesting point to bring up. Why?

Well, because the issue with vaccine doubt, is misinformation. It's disinformation, spread for either profit (followers on youtube), or foreign actors working to reduce the cohesion of the West's societies.

Russia? China? Iran? None of these countries, even together, stand a chance militarily against the West. But if you cannot beat them militarily, you must weaken them from within. So confusion. Distrust. Pour fuel on the fire of any differences between sectors of a society. If you can weaken your political enemy, they it ceases to become a threat. Even better if you can trick your enemy into fighting itself!

It's no secret that a lot of countries are engaged in disinformation campaigns against the West. If you can cause your competitor to have plagues, when they were preventable? Well, that ties up resources, reduces productivity, and so forth.

I honestly believe that much of ID verification on the Internet is about this. A healthy society can handle outliers, handle internally created disinformation. Not so, if 1 guy in a foreign country seems like 1000 youtube channels. And you can see this everywhere. A video with a TTS voice, which is now progressing to entirely crafted video from scratch. Now anyone from China can look like a US citizen, going on about the woes of vaccination.

But if you can identify every person, and they can be sued for slander, libel, or criminal acts? Then you're back to normal, internal, citizen protest. EG, your normal crazies. And it can't be stated enough, there are a lot of marginals. Those "on the fence". If they hear enough nutty stuff, they move into almond territory too.

In the end, China, Russia, Iran won't be truthful or play ball, or will undermine attempts with fake IDs willfully issued, so they'll just get cut of entirely. The West will likely sign treaties.

So. Identity verification, is actually an answer to the vaccine issue. After all, we didn't have this level of issue until crazy Internet posters caused it. Although, to be fair, Elvis Presley is who helped convince youth to get the original polio vaccinations.

One way to look at it, is like driver's licenses. Before them, there was no way to stop a person from legally driving on the road. Take it away, and now they could be fined, jailed, etc for driving "without a license". A few bad actors were just unrepentant, and suddenly everyone could be carded, ID required, just to get around. This is like that. A bad result, eg ID on the net, but the attempt is likely to solve 100 internet pains.

I think if we have any sense, we'll come up with a best-privacy-laden method to allow this to happen. Because I cannot see how it will go away. If we can steer it, make it palatable. make sure it cannot be used by industry to track us, etc., it would be at least a partial win.