The point of digital ID might be to add more cases when ID is required in future. One thing if everyone buying a kitchen knife must fill a long form, another thing if they just must tap a phone on the cash register linking knife ID and person's ID. Half of you are already tapping a phone to pay for the items anyway.
One thing is showing a passport to enter the gay bar, another thing is tap a phone and have time, person ID and bar ID recorded. Much faster. Also the mobile application can collect other data from the phone without distracting a user. So much more convenient.
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