In The Imagination of Disaster by Susan Sontag, she talks about how much science fiction is a disaster. Science fiction books are just the same as comic books with the imagery . Sontag is describing how sci-fi films are being played now in days and how much they suck.She explains how science fiction films most likely is about the creature or mechanical object takes over the world.
When Sontag says " Science fiction is not about science " but she label them as being about disaster which is one of the oldest subjects of art. Its important to her argument because she is correct, science fiction is about mechanical robots, martians and creatures taking over the world. When people announce things like that its gets everyone attention and everyone would love some entertainment as they get also from comics.
Sontag doesn't like science fiction films nor books, she "propose to discuss science fiction films as an independent sub-genre, without reference to the novels." Yes the structure and tone of the essay suggests her relationship with her subject.