Without the government being able to identify you as their citizen, you may be shipped to a prison in El Salvador. You say you have a birth certificate? Sorry, there is no judicial review. You didn't have your RealID on you and Trump doesn't wait for the court.

Seriously though, I don't think the privacy concerns surrounding letting the government identify you as their citizen are a big deal. Of course the government has to identify you as their citizen for driving (drivers license) entry and exit (passport) and certain other services.

And whenever you want to do "incogneto" just don't carry your RealID with you... or your phone. And maybe wear a mask.

I never understood the argument against better identification, and for poor and forgeable identification.