Earlier quoted context omitted.
Good to know. I tried "the left hand of darkness" and didn't like it. Somehow it read more like mediocre fantasy than scifi.
Because the science part takes a backseat to the cultural exploration. I guess that could be either fantasy or science fiction, but since it has spaceships it must be the latter.
Ada Palmer's "Terra Ignota" spoke more to me, and it's also more cultural exploration than science.