In her case? I agree with you entirely, Selassie. She should be prosecuted to the fullest extent of the law.
What I'm trying to say is that oftentimes, rape is a hard crime to convict, given how few rape victims come forward (due to guilt, shame, pressure, or numerous other reasons), and oftentimes, the criminal is given a slap on the wrist or not punished at all (read; Turner, Brock), even if the case is airtight. If you added in a potential felony for the accuser that powerful people could use to further victimize a rape victim who doesn't have the power they have - and yes, Harvey Weinstein existing is proof enough that someone could do that - it would make it all but impossible for a rape victim to come forward.
That's why such felonies aren't prosecuted: if it was utilized, it would serve as a complete deterrent for actual rape victims to come forward, and unfortunately, it hurts Araiza in this case.