I think the moral of the story for Cassandra is that if women do not bow to men and allow themselves to be subjugated, they are cursed to never be believed.

It's a cautionary tale of patriarchy.

Personally, I think it would have been better if I had been taught that the world at large will automatically not take me as seriously as men because of my gender rather than having to stumble on that all my own in my young adult stage.

I'm just musing and building off of your comment, not arguing to be clear :)