This is parallel with the way that "comics" fandom has developed out of superhero fandom and is still largely dominated by it. IN the sixties and seventies, superheroes were irrelevant to most adults and in a definite commercial retreat. But the number of fans who became professionals not only in comics but across the media, in movies, in advertising, in television, in publishing, means that the genre became influential far beyond its apparent reach. Meanwhile, "Comics" fandom continued to be focused on superheroes and associated fields (science fiction, horror, fantasy), even though most comics across the world don't really pertain to them.
So the idea of what is important in the fields of knowledge depends mostly by the social processes within the area. Those fields that have an organizational advance on the rest - superhero fandom among comics, like twelfth-century Roman law experts in the field of law - tend to set the rules for the whole field.