I understand what you're saying, of course, but the first difficulty with that is that the woman isn't aware of the exceptions. But she's definitely aware, because she's told when the visa is issued and she's told when she comes into the country, that she has a conditional visa and she has to stay with her husband for two years or else she'll be deported.
The husband holds that as a sword over her head for two years. So yes, you're right. If she gets access to a website, if she can read the website and understand, there's a lot of evidence. Of course, as a lawyer I can tell you that at the end of the day, it's going to be in the discretion of the officer whether he or she accepts the evidence and there are many cases where they won't.
Leaving that aside, the difficulty that we have in all of these cases is that the woman is aware of the threat from the moment she arrives, that she has to stay here for two years. She may not be aware and she may never have access to the information that will free her.