It's rare to find a technology that's so creepy & exploitative, yet also so fundamentally without utility.
>Proof of personhood is valuable because it solves a lot of anti-spam and anti-concentration-of-power problems that many people have, in a way that avoids dependence on centralized authorities and reveals the minimal information possible.
>If proof of personhood is not solved, decentralized governance (including "micro-governance" like votes on social media posts) becomes much easier to capture by very wealthy actors, including hostile governments. Many services would only be able to prevent denial-of-service attacks by setting a price for access, and sometimes a price high enough to keep out attackers is also too high for many lower-income legitimate users.
Now you could say and then what, but I remember about 10 years ago when all discussions about how to fix email got shutdown by counter posts with that form letter, nothing changed in the open source world and then Google went ahead and solved the problems by doing some of the things that went against the consensus of the letter and today its so hard to run your own email that most nerds don't.
If we do not get a handle on the fake-person situation, how knows if it will even be possible to run your own Mastodon in 10 years?
Now I really hope that it isn't the case that WorldCoin is going to solve this problem (personal preference: the govenments of the world solve this by signing keys of citizens, enabling key rotation and the ability to ban keys signed by countries that abuse your service), but don't kid yourself that there aren't people who would want to use such a service or that it doesn't solve an actual problem.