Even though you're at the bottom of the comments, I'm inclined to agree. In case you're interested, here's an discussion of how this trend might at least be amenable to creating unique cryptographic IDs without the need for central governance.
As a password, biometrics are notoriously inappropriate (have to use the same one for everything; can't change at will; leave it in the open all over the place). But maybe as a sort of username?
https://github.com/MrChrisJ/World-Citizenship/issues/22#issu...