Laws existed before the Constitution was ratified, and the laws present at the time of the ratification of the Constitution spelled out what a “natural born citizen” was.
Easy peasy, huh?
Well, those laws got superseded by others that did not bother to spell out what a “natural born citizen” was. The Constitution was now using an orphan term.
Enter the wonderful circus of legal Rorschach tests.
I say stupid on the USA. We might as well have had a Constitutional requirement that the President be a freeblesnork.
Freeblesnork lives matter.
Maybe we should run our government according to Lewis Carroll's poem Jabberwocky
It might make more sense.