Here's a valid hypothetical (and why "reasonable doubt applies") 

Woman "simply got drunk".
Gave her consent and had sex.
Changed her mind after the fact or had a black out and doesn't remember.
Files charges.. ruins man's reputation regardless of the legal outcome, possibly resulting in incarceration despite having obtained consent.

Was someone hurt as the ultimate result of her getting drunk?  Yup.  Same situation.  Your logical flaw is that you say "she got drunk.  being drunk hurts no one" then end the scenario.  In the workplace scenario you could say the same "he got drunk. being drunk hurts no one" then end the scenario... you're comparing apples to kumquats and describing the taste of OJ...