first of all, it's irrelevant what she says, second of all, at the end, when she turns around, her eyes ARE red, I checked. third of all, it's not the ark that causes the destruction, as you said. the halos cause the destruction, but the ark, as i said in my theory, probably held some Forerunners, who escaped to earth. They might have also held Covenant, who went to their homeworld, and brutes, etc. Do you really think that the Forerunners, geniuses for engineering devices that can wipe the galaxy dead, and putting LIFE on those rings (the surface of halo), would kill themselves completely just so the flood would starve to death? They had to leave some of themselves, ie. the ark, and the humans on it