That being said, here's my strongman argument: Sam is scared of the ramifications of AI, especially financially. He's experimenting with a lot of things, such as Basic Income (https://www.ycombinator.com/blog/basic-income), rethinking capitalism (https://moores.samaltman.com/) and Worldcoin.
He's also likely worried about what happens if you can't tell who is human and who isn't. We will certainly need a system at some point for verifying humanity.
Worldcoin doesn't store iris information; it just stores a hash for verification. It's an attempt to make sure everyone gets one, and to keep things fair and more evenly distributed.
(Will it work? I don't think so. But to call it an eyeball identity scam and dismiss Sam out of hand is wrong)