Nope, it isn't and we don't need "proof of humanity". Nonsense.
Why... do we need "proof of humanity"? Is this from some fear of AI? Don't fall for the AI fear mongering. Remember, when the media and politicians are trying to scare us, they want to take from us. Freedom, money, and sovereignty. Fine to have concerns about AI but it doesn't mean we all need to have our bio-metrics on a blockchain...
I see where you are coming from, and there will probably be a demand for proof of personhood systems, but Bitcoin's biggest threats are probably just widespread apathy and maybe government bans. Most people see Worldcoin as a joke, and thus won't turn to it in favor of Bitcoin.
You can create a web of trust with people gathering at key signing parties and verifying that the holder of a public key is a real human but that's not a new idea; people do that with PGP keys already.
Although I guess it doesn't really prevent someone from handing that key over to an AI...