The intent of the ISO spec is to allow you to request fine-grained data, like birth year only, but if you read the W3C standard, they explicitly call out privacy as a complex thing that maybe should be regulated.
The spec spells out the complexity: some ID verification processes actually need a lot of info! But some, like an alcohol age check, do not. The spec can do both, but it’s hard to differentiate these technically. The spec does lay out what user agents should do to make it clear which information is going where.
A bad scenario would be designing an API that is too hobbled to replace the invasive “photo of an ID” companies, which this spec seeks to do.
I’d prefer an open web standard that can be abused (with user consent) to a closed App Store-only API or the status quo