Um...yeah but she specifically says that when peace in Hyrule crumbles the one with the symbol will apear.
Please stop bending/twisting the quote to make it fit your own context. If need be I'll get Japanese translations for this.
Do it then, please. I want to know what they have to say about this part of OoX with Zelda bringing up Hyrule.
As DL01 said, she could have just been referring to past legends. Based on Hyrule's history, a Link has always appeared when peace in Hyrule has crumbled and they all, in some way or another, have that mark on their hand. She notices the mark and based on the legends, it is the mark of the hero who appears when peace in Hyrule crumbles. Like DL01 said, it doesn't have to mean that peace in Hyrule HAS crumbled, just that he bears the mark of past heroes who have appeared when peace in Hyrule HAD crumbled in the past.
By the way, that was an amazing analogy, DL01.