Just as much a fantasy writer, apparently, this perspective makes sense. But not entirely so, to me. No prediction at all, would fly in the face of what I like most about my go-to fiction genre: exploring possible effects of future technological change.
She also seemed to say there was an unreliable narrator, telling some of this story..? But, even primed, I spotted no contradictory versions of events. [Edit: I don't know where I got this idea from, after re-reading her (1976) foreword. Kindle UK version.]
For a book published in 1969, it has largely dodged feeling entirely dated, courtesy of mostly avoiding high technology. The plot is grounded entirely on a somewhat backwards world (or at least, one that’s in no hurry to fully modernise). So the setting is very vaguely reminiscent, for me, of say "Inversions" by Iain M Banks.
Non-plot spoilers - In the rare appearance of a spaceship, it does sound like a stereotypically antiquated shiny silver rocket. While their FTL communications are basically a pager. Which, I guess, is still ahead of her time…? They have universally electric vehicles too. (I guess that transition is long overdue, for us.)