Data gets packaged up into variables and then passed around to behavior, which could, frankly, do anything to it. Data is like a child that behavior sends off to school every morning; there is no way of knowing what actually happens while it is out of sight.
This effectively describes FP also, with the caveat that most FP languages make data immutable. FP has been very popular lately so this may not be as bad of a thing as she makes it sound.
