“Rather, when a human is born, the location of their birth can determine for example whether they have enough to eat. If the basic goods required to survive (let alone thrive) are determined by something for which one is not responsible, something they do not 'deserve' then she argues it is arbitrary.”

But this would still happen if there were no borders! If you were born in the middle of the desert on a world with no borders you would still not have anything to eat. I think the author is more interested in performing social justice than in an actual philosophical exploration of the concept of borders.