“more elaborate ‘natural born citizen’. “
That’s the whole entire point: There is no elaborate ‘natural born citizen’.
A person is either citizen by birth or not. There is no ‘natural law’. Congress gets to state who is and who is not a citizen by birth as that subject is not specifically called out in the Constitution and the phrase “born in” also needed support, such as visiting mothers to foreign countries. I have yet to get an answer from anyone on that question. Congress also codifies what is free speech and how is it protected and not protected, although the Constitution claims speech is protected.
There are always someone that wants to twist words, mince words, and take words completely out of context and that is where our laws, hopefully, strengthen the words of the Constitution, as it does with 1401 that states exactly who is considered a natural born citizen and who must naturalize.
Nowhere in any law in any place is there another mention of the phrase ‘natural born citizen’. It simply does not exist. The founders meant they did not want an immigrant to be President. They never intended any elaborate rules behind their words.
I take the Constitution to be the ‘Law of the Land’ as a final construction on/of all laws. The Constitution in Article II specifically and explicitly notes ‘natural born citizen’ as eligibility for POTUSA. Those three words are there and I see no reason to say such words do not exist.