@Mivas Her actions will affect her immediate surroundings, but generally they won't affect macroscopic changes/events. For example, she knows that casino would shut down and that would happen no matter what if she didn't interfere in that directly.
Similarly, something like a country going to war - she could probably be aware of that and no matter how much small change she made (unless it was maybe decades in advance) she wouldn't change the fundamental that the war would eventually start (too many factors out of her control).
She realizes that the future surrounding her fate is already different, but the rest (regarding events she wasn't involved in) might be relatively static.