Many people would be forced to sell though if there was a price drop, because the high prices necessitated having a very high borrowing rate (95% borrowed), and commonly at renewal (typically 5 years in Canada) mortgage terms require the borrower to pay the difference between the market value and the borrowed amount to ensure they are not more than 95% leveraged still.

This is the big problem the government has: it is very difficult to unwind this mess through policy without triggering a cascade. Likely it will come eventually, they just want to ensure it’s not their party in office when the shoe finally drops.