The Invasion of the body snatchers, when first made was probably about communists. When remade, it was probably about being different. The single story can be created in numerous ways, because it has a universal structure that is not imprinted with a meaning. Art abstracts away from a specific message.
At the same time, the particular tellings of the myth can create a message. The conversation between those tellings creates a discussion about the point to our lives.