What she said was treated as blasphemy against the religion of "open space" -- and open space is just one of the wonderful things about the world envisioned by liberals that is ruinously expensive in the mundane world where the rest of us live.
Much as many liberals like to put guilt trips on other people, they seldom seek out, much less acknowledge and take responsibility for, the bad consequences of their own actions.
There are people who claim that astronomical housing prices in places like Palo Alto and San Francisco are due to a scarcity of land. But there is enough vacant land ("open space") on the other side of the 280 Freeway that goes past Palo Alto to build another Palo Alto or two -- except for laws and policies that make that impossible.
As in San Francisco and other parts of the country where housing prices skyrocketed after building homes was prohibited or severely restricted, this began in Palo Alto in the 1970s.
Housing prices in Palo Alto nearly quadrupled during that decade. This was not due to expensive new houses being built, because not a single new house was built in Palo Alto in the 1970s. The same old houses simply shot up in price.
It was very much the same story in San Francisco, which was a bastion of liberalism then as now. There too, incredibly high prices are charged for small houses, often jammed close together. A local newspaper described a graduate student looking for a place to rent who was "visiting one exorbitantly priced hovel after another."
That is part of the unacknowledged cost of "open space," and just part of the high cost of liberalism.