Rape is followed by tactical actions that are still not rooted in reasonable logic, the entirety of a rape scenario from the perpetrator’s side of things is a rejection of reasonable/social logic in leu of predatory logic. Predators that crave murder are different from predators that crave dominance, even if they sometimes overlap. There are no statistics that show what you are trying to imply as a functional or observable variable and there have been plenty of places that have legally treated rape and murder as deserving equal punishment.