Contraception is a moral evil during the marital act.
For example, is it licit for a woman to take hormonal medication ( ie, the Pill) for other medical reasons, as long as she refrains from the marital act, due to the abortifacnt properties.
Heck, there is nothing morally wrong if a man decides to wear a condom playing soccer if he’s using it to keep from chafing.
There are no morality issues regarding those at all, do we agree on the soccer player at least
Where it becomes morally illicit is
when contraception is used during the marital act. Humane Vitae is very clear on that.
Rape is not the marital act. It is an assualt upon the victim, (which is not the case in fornication or adultery) and under self defense, the victim is entitled to defend her body, and that includes defending themselves from the rapists sperm.
Now, if conception occurs, self defense does not apply to the child, the child is innocent of fault, and is not assaulting the woman.