I'm not here to agree or disagree with the general premise of the article but "How am I supposed to move if I am penned in by a border wall?" makes 0 sense. Is

I'm not here to agree or disagree with the general premise of the article but "How am I supposed to move if I am penned in by a border wall?" makes 0 sense. Is the author aware that airplanes exist? Or land ports of entry?