Earlier quoted context omitted.
That's not even close to what it's saying. It's saying people in places like SF don't want others coming in/and or want to maximize their home value, so they stop new housing being built, which keeps supply of housing down and thus less people can live in areas where there are lots of work opportunities.
You're thinking too narrowly. Your point is correct, but the broader point is that there should be those same work opportunities spread out around the country so that you don't have to move to SF or wherever to get a good job. That is what hurts the economy on a broader scale. Employment is "sticky" in that personal mobility can't move as fast as capital mobility and that seems to have led to concentrations of wealth…
As for whether you are right, you might think this personal mobility v capital mobility is a clever sounding point. It's dumb. The idea that one simple idea has led to concentrations of wealth is absurd. It's useful in life to actually think things through, rather than parrot phrases you've heard in econ 101. You are literally clueless.