Did he do it on purpose? I am sure the answer is no. Ok, so why are we still talking about this? Because a book can be good, but that doesn’t make it flawless. Because science fiction as a genre is highly prone to gender representation problems. Because the default cast has been 90% male for so long. Because feminism is really about equality, and it’s worth noticing the stories that fail. We as readers and writers can note that this is, in fact, disproportionate representation. That women are interesting characters, who probably have lots of interesting conversations about things other than the men in their lives. And that we want to read about them.
If you can imagine dragons and zombies, you should be able to imagine equality.