“which is why Natural Born is not clearly defined.”
That is wrong. The natural born citizen clause belongs to the branch of law known as Natural Law, which is the opposite of positive law or statutory law. Terms of natural law are defined in the law of nations and in case law from the decisions by juries and jurists, because natural law and its natural born citizen clause are not positive law established by legislation.
Who has argued this approach to the term other than you? I know of two definitions Natural Born and Naturalized, I have not seen your not Natural Born if established by legislation.
What court has this definition been argued in and accepted as settled law?