Her citizenship was a well established legal fact. Her contentions were that A) the 14th made her a citizen, and B) it gave her the exact legal rights of all other citizens.
Contention A was laughed at, since there was no legal basis for it anywhere in our history. Contention B was rejected as well. Since A was so totally insane, Minor is considered a voting rights case, establishing that not all citizens have a right to vote.
The court made no attempt to explore the limits of NBC citizenship, and expressly stated so. Had there been any possible legal question, they would have needed to do so - but they did not. Minor specifically did NOT rule on the meaning of NBC, and it said so in the decision.
It stated who was without a doubt a natural-born citizen and expressed doubt as to the *citizenship* of anyone not born in the country of two citizen parents, Mr. Rogers. Read what the words actually say, not what you want them to mean.