Robert Sawyer, a highly respected science fiction writer(I really like some of his work), has a publishing problem. No, I don't mean that he can't get published. He can. You can get his books in any halfway respectable bookstore that sells science fiction. He's against "self publishing" science fiction. Totally against it.
He claims, in effect, that you will never, ever find a science fiction writer who self publishes. This may or may not be true. Writers who write science fiction are often a quirky lot. And there was "vanity publishing" back in the days of classic writers like Asimov, Heinlein, Bradbury, etc. "Vanity publishing" back then had a very bad reputation, and for very good reason. Also, there was no such thing as e-publishing. For that matter, there was no such thing as the Internet. So I can see where he's coming from.
I should also add that I've seen at least some "independently published" fiction(some of it is actually a type of science fiction). The quality varies, and the audience for some of this stuff may be rather limited. In some instances, I think the writers know this, and that is why they go this route. Occasionally, the writer goes this route after trying to get a "bite" from some agent(very hard to do these days). These writers have done all the right things that they're supposed to do, but gave up in despair of ever having their books published.
However, a lot has changed in recent years, and many of the publishing houses(including the ones that publish science fiction) are subsidiaries of giant corporations, and "traditional" publishing is not in a happy state right now. It's always been hard for an unknown writer to get him or herself published, and perhaps even harder for a writer of science fiction who can't break into one of the magazines(and there aren't very many of those any more, either). Is Mr. Sawyer completely unaware of this? It almost seems as if he is. And, unfortunately for Mr. Sawyer, I think it is only a matter of time before a lot of material ends up e-published anyway. Again, this may not be true of science fiction, but I wonder. I don't know how much time will pass before this is the case, but I am pretty sure this will happen; the publishing business at the moment is in a fluctuating state. And because of this, if there isn't some science fiction writer who has "self published" somewhere, there soon will be, and people will read him or her. And, perhaps, Mr. Sawyer will end up having a very red face.