is that an actual issue, or just a theoretical one? does a bouncer at a bar ever care about, or even look at, information other than date of birth?
Thats a trivial issue, but a good example of how our current means of verifying aspects of identity involves, by incidental necessity, conveying a bunch of additional information which isn't needed in that particular situation.
More important examples would have to do with petitioning, civic engagement, lobbying, etc, where you can verify on a need-to-know, a la carte basis, rather than having to upload your ID. EG in some situations in these areas, it could be sufficient to verify only ZIP code of residence, and age, while other stuff like name, gender, etc, wouldn't need
to be conveyed.
Its parsimonious, and its also safer in terms of how much of your personal data really needs
to be floating around out there. Although in ths case, because of the cryptography, the raw data wouldn't be floating around out there, just cryptographic hashes of it (which can still enable hackers and sleuths to deduce information about you, but its just much more secure than keeping that identity info on private servers, where it can be leaked or hacked.