I think the question was why they're trying to restrict it. From what I understood from officials, I think their belief is that if you make a refugee claim, you should have a determination through the refugee stream, and the H and C should deal with everything that isn't in the refugee stream.
The difficulty with that approach is, of course, as Professor Showler said, that some things are not black and white. To give you just one simple example, there is jurisprudence that says if you make a refugee claim and your risk is one that's felt by everyone, then you're not entitled to refugee status. But the jurisprudence also says that even though there's a generalized risk, it is relevant to an H and C application.
I'll give you an example. In Haiti, there's this disaster now because of the earthquake. That may not be the basis for a refugee claim, but it could be a highly relevant factor when you were deciding whether someone should be given humanitarian grounds. So the problem with the proposal the government is putting forward is that it tries to put everything into nice, neat little silos where one is for refugees and one is humanitarian. But the reality is that life is much more complex than these nice little categories, and there is often overlap, as Professor Showler said.