when housing markets collapse, the economy goes down and people loose jobs. when you dont have a job, you cant buy a house. one of the many reasons why housing market collapses are not refered to as affordable housing.
don't need to look further than 2007-2009 to see an example of this.
You can see here that home ownership did not go up: https://en.wikipedia.org/wiki/Home-ownership_in_the_United_S...