I, and I'm sure most, wouldn't argue with the accuracy of your overview of jury duties, but the fact remains, nothing is perfect--especially the behavior and "objective nature" of jurors and their desire to seek the facts and conclusion of the case. Jurors can and often do get swayed by emotion.
What I'm really confused about here is why the defendant can't use other adjectives to describe the "sex" that they allege was not willful. I read nothing in the article that says the defendant can't decribe the "sex" as being nonconsensual; that said, why not state the sex was forced upon her, or was an unwilling act that was aggressively acted out. These two forms are accurate yet don't carry the stigma of the word "rape." The dynamics of a courtroom case preclude us from knowing the legitimacy of the situation, and still, the possiblity of sexism remains.
My point is I feel there could be a sound reason for the omission, but whether it is justified in this case is another point that can't in the context of this article be truthfully found.