I think the rationale is that if tech workers weren't so prevalent in the Bay Area or didn't make so much money, then these houses would sit empty long enough f

I think the rationale is that if tech workers weren't so prevalent in the Bay Area or didn't make so much money, then these houses would sit empty long enough for the owners to reduce the price. That, and probably just a broader desire among many media outlets to depict tech as the Big Bad (TM). Chronic lack of supply and tax policy that incentivizes holding onto one's home for as long as possible isn't as compelling a headline.