A huge chunk of the issue with false rape accusations is that the high-up stuff actually often never lands in court in the first place, or at least not before lives are ruined. Because we live in a society where most of the potential benefit to it (the destruction of the life of someone you hate and widespread sympathy) doesn't actually require getting the courts involved. Like, look at how utterly wrecked Vic Mignogna got without anyone taking it to court against him. His reputation wasn't even actually destroyed, since a huge chunk of the fanbase called the accusations a pile of horseshit, but some sad words is all it took to get the people employing him to knee-jerk his ass out the door. Twenty year career gone from little more than sob stories on Twitter, without any legal proceedings of any kind.
Also, "not enough evidence to convict" applies equally to covering up the magnitude of false accusations as it does to depress the rate of proper convictions. Which is to say, it is by definition inapplicable, statistically, because it's inconclusive data. Which makes the proven-false ratio go up quite noticeably.
Also also, so fucking what if false accusations are rare? Our legal systems, to the point of widely recognized human rights, operate on a presumption of innocence. Unless it is proven it did happen, punishment should not occur, fuck public opinion. And companies better damn well need to show they're taking damages if they're firing people over outrage, because the funny thing about outrage is that the complaints of a handful of well-off assholes can look an awful lot like a large mob, out of persistence if nothing else.
Fuck. The. Outrage. Mobs. May they rot in fucking hell. Once again, go unfuck the legal system if you think it won't work, don't throw out rule of law.