The fatal flaw of this plan is not in the plan itself, but that it’s only relevant to people who were too dumb to understand what they could or could not afford when buying a house in the first place, and in most used cases the worst possible form of financing.
Your advice, troubling as it may be to honest money savers, and people live within their means is the same type of advice these people ignored when buying in the first place.
These people won’t save money they would otherwise put towards a mortgage if they stop paying, they’ll spend it. And credit card debt doesn’t go away after 2 years.