From the article:
...we're horrible people for living in a cheaper rental that someone more "deserving" should have...
Wow, that is one of the stupidest argument against frugality I've heard, but come to think of it, I can totally imagine certain people I know saying that. The same people who also hate on wealthy people for living in sprawling suburban mini-mansions.
Economically, the argument doesn't make sense. If you live in a cheaper dwelling, that (in a small way) lowers the price of larger dwellings, and makes them less profitable. Which should, in a free market, lead to construction of more modest and affordable housing.
So... really, you're doing your part to solve the housing crisis, and make housing more affordable for all.