Exactly. The same way that selling alcohol doesn’t require a paper trail of every beer I’ve bought.
I guess I could make an ID (not a counterfeit government ID) that uses the same encoding for the birthday.
Here are the specs for what appears on the driving license/ID and how to read the barcode:
https://www.aamva.org/getmedia/99ac7057-0f4d-4461-b0a2-3a553...
They issue a new spec every 4 years.
But the underlying darkness is that if you're paying for things using a CC, you've already given up on your privacy, but it's implicitly lost, rather than explicitly.
Well, not every beer but when you shop at Beers-R-Us they know.