

Exactly this. If I had to chose between hundreds of third party websites having my ID and my phone, I’ll take my phone.
We already have very sophisticated ways of validating payment and passport information with our devices. Validating age could be as simple as a registration procedure between the device and the identity issuer , validating the device is held by a person “of age” and then that’s it. If that user successfully completes a biometric challenge, then allow the activity.
So web browsing goes from “I’m John Doe and here’s my ID proving it” to every site (which has HUUUUUGE PRIVACY ISSUES) to “This anonymous user is over 18; this one is over 21, this one’s not”.
Also, if this behavior of forcing websites to ID you continues, it will enable a renaissance in data mining. Right now companies see “actor is in ZIP code 90210; rain in the forecast “ and put the two together to show “maybe they need a new slicker”. That’s simplified of course, but that’s basically the trick. You can use hundreds or thousands of these data points to paint an ever clearer picture of the person, but you never know exactly who they are. These ID laws are changing this rapidly.
This also has the potential to be used for some very dark purposes. Example: said something on Instagram critical of the US President? You don’t get to vote because of some label.
My position is still if the site or service requires my ID, then I don’t need it that badly.
“A Splendid Torch” by George Bernard Shaw