Becoming and then staying homeless for a significant time is often almost irreversible. The key is to prevent people from ever getting there, as much as you can - and that is the point the poster above was making. The fall from house + job > house > no house makes it very hard to ever get another job that actually pays enough to go back to having a house.

In Bangladesh someone can put up a plywood shack somewhere and call it their home

Anyone living in a tent city would most likely not only survive but thrive there