This national rule prevents us from interpreting natural-born citizen under common law rules because it eliminates the possibility of a child being born with more than one claim of allegiance.
To me this is the crux of the NBC clause.
I think the intent of the founders was to avoid any potential conflict with allegiance to any country except the US by a potential or real potus.THe idea was to avoid dual allegiance by a president.
It actually happened with zero as well.
When he was born at the time of his birth he was a British citizen since his father was born in Africa not yet Kenya which was a British possession at the time.
You can't have someone who has dual allegiance or is a dual citizen as potus and the founder realized that,IMHO .