Earlier quoted context omitted.
> Markets are not a solution for all problems: market failures are quite real, and no, they are not all caused by government. This particular market failure is definitely caused by government.
Homelessness never existed before government regulations?
Part of that may be changing terminology -- earlier use of "homeless" tends to focus on "people made homeless" (or "... left ...") after some calamity: structure fire, flood, hurricane, etc. In the 1980s "homeless" became a chronic condition. Other terms may have existed for the long-term unhoused. I'm not aware of them.
What specifically changed, I'm not certain, though circumstances leading to the role of real estate as an asset rather than a utility may be part of that.
https://books.google.com/ngrams/graph?content=homeless%2C%20...