I think the bases of the alien was written by Dan O’Bannon, so the sexual assault theme was built into the concept. The notion of sexual consent was only in the 1970s entering the discussion of morality. There was a lot of controversy about whether the sexual assault of a married woman by her husband should be regarded as a crime, and in redder regions of the US, it’s still a question.
So yes, stories meant to examine sexual assault, whether predators who use sexual lures or brood parasites and the body horror they invoke were running through the creative veins of Hollywood.