Exactly. The privacy characteristics of government ID cards are worse than any other solution. When sharing such an ID, a person is providing several global, stable identifiers (e.g. ID number, full legal name). For adtech and data brokers, this is the ultimate fingerprint for tracking and matching.
In a perfect world, the digitization of these IDs would come with modern digital privacy and security. Scanning your ID number would only provide a recipient-specific ID that couldn't be matched with other vendors. Age eligibility and driver's licensing status would be presented as separate signed attestations that share no other data.
