I think I can shed some light on her behavior. In the view of religious people in the mystical traditions which paganism tries to emulate (with varying degrees of success, but that's beside the point), the world is vast and beckoning, yet our faculties are barely adequate to scratch the surface.

A mystic, or even a skeptic, sees our thoughts and perceptions of the world as metaphors in themselves, which become more and more deeply abstracted. Our vision and sense of space has a "metaphorical" relationship to the actual, physical reality that we find ourselves in. In the same sense, language and mathematics (math is a subset of language, but I thought it was worth singling out) have a metaphorical relationship to the raw universe.

The point of mysticism is to snap one's consciousness out of the notion that what you experience in day to day living can be trusted, and it calls for the mystic to look more closely at what experience really is: a useful metaphor for what is actually taking place in the universe around us.

So it seems that what this woman was trying to do was at least two "layers" deep. The first, most obvious layer, is that she was emphasizing the ridiculousness of taking the story literally, to force the audience to consider it as a useful metaphor. The deeper message she was conveying by making it clear that what she was saying was not to be taken literally, was a wake up call. It was a call for the audience to think in a fundamentally different way: not only is this creation myth a metaphor representing psychological and physical phenomena, but those phenomena themselves must be examined as metaphors.

She was trying to train the audience members' brains to think mystically. And appropriately enough she did it in an abstract, almost metaphorical sort of way, that the concrete thinkers here totally missed. Biases abound!