You are, of course, wholly correct. But for reasons far beyond utilitarianism. It is wrong because we degrade our society and culture by mistreating our women and putting them (in the current phrase) in harm's way.
But various "crises" like this one also suffer from our true definitional crisis. Sure, true 'sexual assault' is indefensible, but much of which passes for 'sexual assault' to our feminazi-dominated society is really consensual sex.
We recently had a 'court' here in CA determine that a female could consenually begin a sexual act with a male and, at any time prior to its quite natural end, change her 'mind' and the consensual act was thereupon transmuted retrospectively into 'sexual assault'.
So, we can't simply sign on to the prevailing shorthand. Difficult as it is, due to the degradation of our language, we should begin our conversations with "Of course, the initiation of sexual contact between unmarried persons by menas of physical force is always wrong...."