^^^
That's why what we have is a 'Legal' system (and not a 'Justice' system.) Again, I understand what you're saying but as soon as we make an exception where "Oh, if you're accuse of a a forced sex assault, we'll ALWAYS believe the 'victims' word and convict/sentence based on that..."
Again, whenever this type of thing occurs it's horrible; but if it's your word against someone else's and that's it (no other evidence whatsoever) - IMO that's not enough to convict or label someone a sex offender. And again, it doesn't make it 'right' - but once you go down the "You can be convicted SOLEY on a person's word alone..." <--- That's not a place I want to live/justice system I want to be judged under.
This^
Of course child abuse is abhorrent. Of course it is. Of course victims should be believed. Of course - not only for their own sakes but also to make it easier for others to come forward, whether they are accusing the same person or someone else.
However, belief is not proof beyond a reasonable doubt, and thank God that it's not. We can believe victims' statements and take them seriously and investigate them up the wazoo - hell yeah! But they don't prove anything without more. What's more? Physical evidence, confessions, tapes, circumstantial corroboration, sexual acting out by very young children (a four year old who understands what oral sex is, is
highly likely to have been exposed to some degree of abuse. But this is not a lead pipe cinch when the victim is a teen), etc.
We also need to consider the double jeopardy situation. We don't keep coming after someone, over and over again, in the US. We can't - it's un-freakin'-constitutional (fifth amendment, see:
https://www.law.cornell.edu/constitution/fifth_amendment ).
I am not without sympathy/empathy. The biggest problem is that victims often take years to process their experiences. Alison Arngrim accused her brother, and it was some 14 years after the events – and she noted that 14, 15 years is pretty typical for victims in terms of processing time. This also dovetails into victims often being convinced/coerced/strong-armed into keeping quiet. "Our little secret", etc. Plus that can run smack dab into statutes of limitations although a lot of American jurisdictions have nixed the idea of a statute of limitations for signification offenses against children such as abuse, see:
http://www.ndaa.org/pdf/Statute of Limitations for Prosecution of Offenses Against Children 2012.pdf
The second biggest problem is that victims are isolated and that means it's harder to find proof beyond a statement (notice I am using the term proof and not evidence. Fun fact: evidence is stuff that's admitted. Proof isn't always evidence, but evidence is always a form of proof). With no lasting physical consequences, no physical evidence (bruising and the like), no confession from the perp, man oh man it is difficult to mount a case.
The third biggest problem is the very youth of the most vulnerable victims. Infants can't testify, of course, and usually it takes a lot of fancy footwork to get a preschooler's testimony admitted. Courts want to be fair all around and so it's tougher with very young children because the dividing line between fantasy and reality can often be blurry. A child who believes goblins are real and who doesn't think they'll get punished (or go to hell) for lying, and is under the age of 5, is likely to have his or her testimony impeached expertly by the defense lawyer. Plus courts and DAs would rather not further traumatize very young victims by making them relive the experience via testifying.
What's the solution? I wish I knew. One is to keep encouraging victims to come forward, regardless of when they do, and give them a means of doing so without being excoriated for coming forward. Another is to find a way to protect children from circumstances where abuse can happen (means limitations). But that's a lot trickier, particularly when the perp is a parent or sibling. In the case of Hollywood, it would probably be a good idea to start copying what the medical profession does - have a third person in the room during examinations (in Hollywood's case, auditions). That doesn't fix all of it but it could be a start.