What is significant about unofficial, extra-canonical fan fiction is that it often spins the kind of stories that showrunners wouldn’t think to tell, because fanficcers often come from a different demographic. The discomfort seems to be not that the shows are being reinterpreted by fans, but that they are being reinterpreted by the wrong sorts of fans – women, people of colour, queer kids, horny teenagers, people who are not professional writers, people who actually care about continuity (sorry). The proper way for cultural mythmaking to progress, it is implied, is for privileged men to recreate the works of privileged men from previous generations whilst everyone else listens quietly.
–Laurie Penny on fanfic.
Penny is talking about Moffatian shows like Sherlock and Doctor Who here, which are fanfic in every way we don’t culturally recognise. That is, they’re written by adult white men though formal institutions of power (e.g. the BBC).