It seems that either these people, including AOC believe that they are only at risk from catching and spreading COVID when a camera comes out, or they know that housing their mouths in face diapers gets significant social media clout.

Or perhaps a third reason might be that they know they are at risk of an online drubbing from their own mentally unhinged kind for not wearing masks at all times.

Or perhaps they choose to be seen in a mask to encourage the public to wear masks.