Rape is hard to prove. If one party claims consent was obtained and the other that it wasn't, and there is no recording, it's going to be difficult to make a finding of fact based on the testimony of the two parties. In the absence of clear evidence of lack of consent, with no further evidence, I would expect most cases to result in a finding of not-guilty or not to ever result in a charge.

Think about what evidence would it take for you to be convinced consent was absent, beyond a reasonable doubt; and how would you provide that evidence if you were a victim in the situation in the article.

On the other hand, many false rape accusations are fabricated with completely made up details. Depending on the details, it can be easy to prove the accused (or the accuser) wasn't in the place claimed, or other details don't fit.