It most certainly is relevant. There is no requirement in the Constitution that both parents had to be citizens.
You didn’t read the article did you?
When the drafters distinguished between the citizenship requirements for Senators and House members and those for the President and VP they used the term “natural born citizen”. They did not have in mind a mere citizenship requirement for the latter, who would or might also serve as the commander in chief.
The term used for the two highest offices was, at the time, well understood to mean “born of two citizen parents.
If the issue was the intention of the parties regarding the definition of a term used in a contract, it wouldn’t be much of a case.
But one suspects you know that.
Have a nice evening.