>>103623712It was more a product of the time. Rosemary's Baby came out in 1968, and the context is that it is intentionally evoking the Cassandra effect, to criticize the "Oh, she's just hormonal" argument, by showing that the threat is real and she is thinking rational, despite the claims otherwise.
So the comic is kinda right, but misses the point that its not a weakness of the story, but part of the message.