That isn’t what they said, which is why WKA addressed the issue in the 1890s.
Wong Kim Ark was about whether or not a child born on U.S. soil to parents who were not yet citizens have a right to citizenship. It was found that the parents has legally immigrated to the U.S. and thus had partial allegiance to the U.S.( not yet sworn in as citizens). Ark was said to have citizenship equal to that of a Natural Born citizen. He was never granted Natural born status. Ark was granted citizenship by code not by birth.