Another way to look at is what you do when you kyc. You leave all your details together with your adress and how much Bitcoin you have in hands of exchange. Every, every single exchange leaks your docs at some points, could be in past or the future. When Bitcoin is worth millions your kyc data is going to be most sought data on internet. And while you can tell the state about your boating accident and it may work… Its not going to work against criminals they are going to get every last sat they have next to individual’s name one way or another.