Logic fail is claiming there is a logical reason why all single wage earners SHOULD be paid enough to afford a two-bedroom rental in their current location. Emotions might tell you that but logic does not.
One pair of my grandparents is still living, in the same house. Houses that have sold on their block in the last few months were all around 800 sqft and went for an average of $95,000 -- which is an affordable 3.2 times the median income in the neighborhood (it's a poor neighborhood.) A single earner can provide a house, provided it's a house similar to what single earners could provide decades ago -- but there aren't many of those on the market. We keep building bigger houses and then wonder why the poor can't afford to keep up.
[0] https://www.census.gov/const/C25Ann/sftotalmedavgsqft.pdf
I don't want to diminish the very real struggle some families have with finding adequate housing. But I do think that the linked article has no real clear thesis other than that they wish housing was cheaper. I'd venture that everyone wants that to be true, always, and forever.