This is, realistically, how a Prime Directive might play out if it were seriously adhered to, over centuries and not 42 minute stretches. It was published the same year that TOS premiered and presumably partakes of a similar zeitgeist.
It's interesting as a period piece and as very early Le Guin. Her introduction teases out the kind of sexism that happens when you say you don't care if your characters are male or female and you just happen to reinforce a pile of sexual stereotypes, but I was surprised by just how much casual sexism pervades throughout -- when Jakob in his POV makes a disgusted reference to "male hysteria", for instance. Sharp contrast to the last book I read that was published in 1966 (Babel-17/Empire Star).