Ursula Le Guin:
“It is shocking to find that an editor at the publishing house that had the wits to publish J.G. Ballard (as well as the Norton Book of Science Fiction) can be so ignorant of what Ballard wrote, or so uninformed about the nature and history of the science-fiction genre, or so unaware of the nature of literature since the 1980s, that he believes — now, in 2009! — that to say a writer wrote science fiction is to malign or degrade his work."
“To define science fiction as a purely commercial category of fiction, inherently trashy, having nothing to do with literature, is a tall order. It involves both denying that any work of science fiction can have literary merit, and maintaining that any book of literary merit that uses the tropes of science fiction (such as Brave New World, or 1984, or A Handmaid’s Tale, or most of the works of J.G. Ballard) is not science fiction. This definition-by-negation leads to remarkable mental gymnastics. For instance, one must insist that certain works of dubious literary merit that use familiar science-fictional devices such as alternate history, or well-worn science-fiction plots such as Men-Crossing-the-Continent-After-the Holocaust, and are in every way definable as science fiction, are not science fiction — because their authors are known to be literary authors, and literary authors are incapable by definition of committing science fiction.”
In an essay in The New Scientist (16 September 2009), Kim Stanley Robinson claimed that the Booker judges consistently rewarded “what usually turn out to be historical novels”.
“Speaking as an outsider from California and as a science fiction writer I see these very brilliant writers doing excellent work who are never in the running at all, for no reason except their genre and who their publishers are – the so-called club members. It just needs to be said. The Booker prize is so big, the way it shapes public consciousness of what is going on in British literature, but the avant garde, the leading edge, is being ignored or shut out of the process entirely.”
http://sffmedia.com/books/science-fiction-books/417-why-science-fiction-authors-just-cant-win.html