I believe it was because it was such a weird and dramatic shift in tone from the regular CAD content, which was not all that great to begin with. You probably had to be there (I wasn’t).
Hbomberguy did a video on it that explains it well I think: https://youtu.be/TebCHHCw9rY
You don’t do that. You present the cop a QR code generated on the fly by the ID app when selecting “show ID” (or driver’s licence, in our country) that they then scan with their equivalent app or device. You don’t physically give them the phone. At least that’s the idea.
Like in many countries (traffic or street) cops here barely have a high school education and it’s not unusual for them to be too stupid to be able to scan a QR code. So carrying your plastic cards with you is prudent.