While I don't care about Worldcoin (I think it will fail, because they are solving the problem that does not exist), this post is false in multiple ways.
First, retina scanning output hash is deterministic - it is supposed to generate the same result for the same eyeball. So it can't be replaced with random number generation.
Second, network does not interpret hashes, except for making sure that single hash is awarded funds only ones. Network however pays attention to whom is sending the hashes. It must be "legitimate" Orb units, likely considered to be legitimate because their public keys were whitelisted.
Third, process of distribution of initial tokens is obviously NOT OPEN. You need a "legitimate" Orb unit to participate. Which has nothing to do with how the network will behave for users already on-boarded.
Fourth, PoW has nothing to do with it. PoW is antisybil for people who might add new blocks. PoW has nothing to do with people who just want to transfer or hold funds. Or even with people who can create money according to network rules.