You can't have a certain category of crime for which all accusations are be taken at face value and truthful by default.

Point of order - that is not what is being advocated for here.

No one said "Let's ruin people's lives based on taking an accusation without any proof"

They said "Consequences for rapists" and somehow that jumped to "there's no way to prove rape happened" like it is a crime that leaves behind no physical evidence or corroborated accounts of repeat patterns from multiple often unrelated victims who have no knowledge of each other.