There are two kinds of horror stories: experiments about mad scientists and ferocious monsters. In the horror stories about monsters, monsters symbolize the psychological confusion of the protagonist. The horror stories about mad scientists typically express the author's feelings: scientific knowledge alone is not enough to guide human exploration. Despite these differences, these two types of horror stories have the following characteristics in common: they describe phenomena that go against the laws of nature: they both want to frighten the reader.
If the statement that some stories that use symbolism describe phenomena that go against the laws of nature is true, then all descriptions of monsters must describe phenomena that go against the laws of nature.