Vancouver has hints of insanity, but Toronto's pricing is entirely rational for the current financial reality -- more and more people, and more and more money, bidding up a fixed amount of housing. It has significant ongoing migration from around the world, so if you're a new grad who wants to live downtown, well your dollars are competing with dollars from around the globe. That's how those things are supposed to go.
The fly in the ointment is, of course, low interest rates, and minor movements would be catastrophic. Which is exactly why I think low interest rates are essentially the fundamental reality in the US and Canada -- they have been structurally stratified, and any increase would cause economic devastation that would cause the rates to drop again.