The government, the banks, people in finance or good with finance and armchair economists know that the top is in, and the ride only goes down from here.
The only groups of people that don't know the housing market is crashing are two groups of people:
1) people heavily invested in housing - they aren't willing to believe the repercussions of it due to the logic demonstrated in the quote above
2) the media - they might very well know, but the news outlets don't make money telling people news. they make money telling people what they want to hear. What they want to hear is that their house is the best investment vehicle and that canadian banks are prudent.