I think the article is satirizing a strawman.
Most of the people being ridiculed are not homeowners looking down their nose at the homeless, they are basically renting from the banks and chained to mortgages. They will become homeless themselves if the value of housing drops too far from what they borrowed.
It will also have ripple effects in the form of banks going under, retirement funds being depleted, and the economy as a whole tanking. If homes become cheaper too quickly the result will be a lot more homeless, not fewer.
In short, there are very valid non-selfish reasons why people, corporations and politicians don't want to make homes lose value too quickly. It's not malice against the homeless.
This is a systematic problem in many western nations and it doesn't have a simple solution.