Do you even know what ZK and KYC mean? It is zero knowledge and know your customer. How can you provide a proof that you know your customer if you have zero knowledge about him?
I think i know and i will give you an example . Let's say i want to subscribe into one exchange . Currently i have to send them my national identity or passport , proof of address , phone bill etc . With ZKP i can prove that i'm a citizen of a non banned country but they will never know from which country i am , that i live in my city without showing them my specific address and that i own a telephone number from a company based in the country i live and not an anonymous sim card . In other words i don't have to prove in detail all of my personal info but just prove that i'm eligible to be registered in that exchange .
Seems that you have a misunderstanding of what ZKP's can provide . A video that might help is
https://youtu.be/D4iUeVbib_k?t=1141 , i'd suggest to watch it all . Another one close to eli5 is
https://www.youtube.com/watch?v=V_ZWNFUHlRQ . Of course , i could provide videos in more detail but these are considered "anathema" here and i won't .