It falls within broad mandate of discussing language writ large, especially since the genre of literary fiction is being defined for its “allegiance to language.” (Whatever that means.)
Other than the marketing value of being able to target “literary” books to specific demographics, I don’t see why we need a genre of “literary fiction.” Then there is the question of whether it’s a genre at all. What are the common characteristics of the supposed genre? Literary fiction is, essentially, well-written fiction, and that’s not a genre but a qualitative classification.