From a fantasy-as-mode perspective, where that term stands in opposition to mimesis, SF is a marked category, since it's a particular flavor of divergence from mimesis -- and a relatively new flavor at that. But the genderization of the subsets means SF gets to arrogate unmarked status for itself based on its alliance with masculinity and all those associated traits.

Soapboxes really need to be built more ergonomically, don't they?