Your made up definition. If not made up by you, made up by someone else. It obviously is not true, and it is ridiculous to suggest that it is.
According to the definition you supplied, if an immigrant became a U.S. citizen, married another U.S. citizen, then their offspring would NOT be natural born, as their immigrant parent was a “naturalized” not a “natural born” citizen.
Are you backing away from your made up definition? Repudiating it? Admitting that it is fiction?
So you agree with the statement one born in the country, of parents who were citizens of that country. Is that better?