I’ve just had a quick scan through Appendix 1 and it ends with:I have to re-read them books. Or at least the first one before the movie.
Indeed that happenend
But that's quite normal in the Patriarchy that was the Empire.
Which makes even more implausible the existence of lady Liet, Imperial Planetologist
“By this time his son, Liet-Kynes, was nineteen, a full Fremen and sandrider who had killed a hundred Harkonnens. The Imperial appointment for which the elder Kynes already had applied in the name of his son was delivered as a matter of course. The rigid class structure of the faufreluches had its well-ordered purpose here. The son had been trained to follow the father.”
Replacing “son” with “daughter” doesn’t cause me any issues as I can’t remember any specifics about the class structure mentioned, and if you think it’s implausible in the 11th millennium, well, I hope you can enjoy the rest of the new film.