So now we all have to carry around a breathalyzer to test each other's alcohol level before consent can be truly considered consent?  Do you see the absurdity in your argument?

Everyone would have to be hauled off to jail if we were to go with your assumptions.  The only innocents would be the ones who abstain from alcohol.

When does personal responsibility come into the picture?  The woman could have called up a friend to help her home or not get piss drunk if she is by herself.