Unfortunately LaLyra many people seem to think that choosing to get drunk is choosing to allow anything on earth to happen to you afterwards. We attach no moral judgement to a condition like epilepsy, but we do to drunkenness, because the element of choice (in becoming intoxicated) is then wrongly transferred to subsequent events.
In fact, this is reflected in the criminal law, in which voluntary intoxication is not a defence to many crimes, where you could reasonably foresee the effect of the drug. Including, interestingly, rape.
Unfortunately, among cloudy thinkers, that concept seems to bleed into consideration of complainants too.
Rape is a difficult crime because sex is something that a person may well consent to (as opposed to say, having your house burned down or your foot cut off (the law precludes consent to most cases of bodily harm, but that's another thread)). And drunkenness in many cases makes a person more likely to consent. We most of us know that from personal experience. A pp has written out her own example. But at some point, drunkenness becomes so severe that no meaningful consent can be formed. (And it's the role of expert testimony (like that given in the application to appeal by Prof John Birch), to illuminate what may actually have been the case based on the evidence given.)
All of these things are reasonable considerations that are put before juries and if you read the summary of the case linked above they were quite comprehensively covered in the judge's summing up (at first instance).
What is not reasonable is the assumption that because someone was drunk they consented or, worse, that their drunkenness negates the defendant's responsibility to form a reasonable belief in consent. This is not what the law says about rape (a point made over and over above, and why it is highly unlikely that CCRC will find grounds to send the case back to the CA).
I have throughout my adult life been horrified by how many women share this last view, and can only assume that as the potential or past victims of rape, they are the ones who have the greatest interest in denying it. That old cognitive dissonance again. (I am a woman, women are raped.)