The conjecture that you can easily take down someone with a false accusation is disproven by the fact that every single case I've heard of has involved multiple

The conjecture that you can easily take down someone with a false accusation is disproven by the fact that every single case I've heard of has involved multiple accusers, photographic evidence, and/or admissions by the perpetrators. It's widely reported that, for example, the Washington Post ran an in-depth investigation into one accuser of Roy Moore, and found out she was lying to discredit their reporting. They did this due diligence even after every sane person was already convinced that Roy Moore was a creep. So, presumably, they would have had more reason to believe her than anyone accusing someone previously not connected to such allegations.