Presenting a consular card creates a reasonable suspicion that the immigrant is illegal.

A legal immigrant using this card when they also have a driver's icence doesn't make sense. And if it doesn't make sense, its usually not true.

They may wish to obtain the card to be "registered" with the Mexican government for consular protection, but would certainly use a US driver's licence as ID to board an airplane within the US.. Or they would use a passport, or green card. Anything but this bogus matricula card.