Everyone is upset at the eye scanning but honestly I have no idea how this could actually be exploited for evil. Like is he going to turn around and sell person

Everyone is upset at the eye scanning but honestly I have no idea how this could actually be exploited for evil. Like is he going to turn around and sell personal data on the world's poorest people? What would anyone do with that? I still can't get past the fantasy economics of crypto. Bitcoin and Eth caught lightning in a bottle and fueled a wild speculative frenzy that made some people a lot of money but they have utterly failed as currencies. No one has come within 1000 miles of dethroning USD with crypto, specie or even a rival fiat. What the hell is issuing Worldcoins supposed to do for anyone?