Do you know why? Because the actual sentences these folks tend to end up with are often similar to folks convicted of homicide, rape, violent robbery, etc. One of the Steubenville rapists was sentenced to around 2-4 years, for example. And he is the same age as the accused here.
The idea that the punishment for rape should be similar to the punishment for white collar crimes where no one was materially injured is preposterous. The system is broken in a very fundamental way and jabbering on about the subtleties of the difference between maximum and expected sentences is not contributing to the discussion in a meaningful way, in my opinion.