This issue will be debated. The Bank of Canada's mandate is reviewed every five years. I think that the next review will take place in about two years. I'm sure that this issue will be part of the discussion.
I don't know of any country with a central bank mandated to promote home ownership. However, we know that some countries, such as the United States, are mandated to maintain low and stable unemployment. Canadians and the central bank need to discuss this issue.