Came here to say more-or-less this.

We now define consent as something so etheral (probably rightly so) that it's virtually impossible to prove it was granted (clearly, "leave me alone" remains unambiguous). People can change their mind but feel coerced to continue, or grant consent to something different than what ends up happening. Court cases thus go down the "he said, she said" route.

I don't really know how to get out of that.

The flipside is that, indeed, because genuine accusations are so thin on physical proof, it is so hard to separate them from fake ones. Whenever I hear someone publicly shamed for sexual misconduct and the wrath of public opinion descends on them, a part of me shudders at the thought of that happening to an innocent person, with no defense available.