Your screed is only true if one ignores Article 1 Section 8 of the constitution that specifically grants to Congress the unlimited and exclusive right to establish a uniform rule of naturalization. Which includes ALL rules, i.e. how citizenship is acquired - granted at birth or granted post birth via naturalization. It further requires one to ignore the exercise by Congress of that very authority both in historical precedence and current law as detailed in Title 8 Section 1401.
But we have argued this before. I am not going to change your view and you are not going to change mine.
No law passed by Congress changes the Constitution.
These is not a country on the planet that does not recognize natural law for citizenship. As such no positive law is needed to define natural law, and no positive law can change natural law. So if country X want to grant citizenship to anyone who falls from an airplane into their country they can make a law for such a circumstance but their law will never award NBC to anyone who acquires that citizenship naturally.