That's right. So why did you write this:
"It's just not possible for them to be able to see into the future. They don't know what they don't know. There are just simply things that they could not have foreseen."
The 14th Amendment was an intentional choice to confer citizenship upon everyone who was born here, other than diplomats. If you don't like that choice, then you're free to advocate for changing the amendment. Personally, I think there are many, many changes to the constitution that are of much higher priority. If you want to focus on weird hypotheticals of pregnant women wandering the desert, go ahead. It's your right, just as it's my right to draw the conclusions that inevitably follow.