I think the problem here is that you're addressing an entirely different question.

The question of if someone should report someone who raped them is entirely separate from the potential chance for false allegations.

If someone is raped, they should report it. If someone isn't raped but wants to make a false allegation, real cases of rape being reported won't change that person's decision to file a fake claim.

The entire point here is just "if you are raped, you should report it, even if that could ruin the rapist's life in some way, because they raped you, so they deserve consequences". It doesn't make a judgement call on how we can combat false allegations.