Many innocent people are falsely accused of rape. The accuser may have consented but changed their mind, or simply wanted revenge; accusation often seems like the simplest solution. But even the accusation of rape can lead to arrest, interrogation, and destruction of reputation.
Falsely accusation of rape is an INSULT to real victims. The accusers make accusation of such a horrible violation seem like a small way to get revenge. And the accuser usually gets off scot-free even when the accused is proven innocent. But the accused may never get hired, and they are scorned by the public. Their lives will never be the same, just because of a false accusation. By punishing false accusers, such actions will be discouraged, and innocent people's lives won't become ruined.