A woman's state of inebriation is no consideration if it has been insufficient to consider inability to consent
This is a slightly different point. This goes to the quality of evidence after the event, which is not the same thing as taking self protective measures at the time. If you're talking evidence, in any trial on any subject, any trial at all, a witness who is drunk at the time of the events will make a less credible (not necessarily less honest, but less credible to the judge/jury) than someone who was sober. It is totally fallacious to suggest this is limited to rape trials/complainants.
I also disagree that rape defendants are not challenged about whether they have been drinking. Where have you had that from?
But I think the court system is a whole other issue.
In terms of what the judge said, she was talking about preventing rapes, not about conviction rates. As someone who feels if I had had my guard up, I might have avoided being raped (it wasn't alcohol in my case so much as naivety), I feel really strongly that in a world where so many men feel entitled to violate women's bodies, we should do all we can to protect women and encourage them to protect themselves.