Reading Hyperfiction - Mission Impossible?

During readings of hyperfiction studies I have noticed a peculiar tendency in relation to the study of literature. Most of them focus exclusively on form: complex web-textuality, multilinearity and architecture as well as navigation, inderterminancy and the role of the reader and author. One has to ask: Why do very few of these studies of hyperfiction deal with the content, i.e. the story, the plot? But rather employ these aspects only in relation to form?