But empty units are empty units and too many of them means you need to lower prices or you are losing out on money because you don't make anything from empty homes.
And whatever effects this has (I'm curious to see what comes out off the lawsuit), you're just not going to be able to say "wow, look at how much landlords in San Francisco are making.... gosh, I want to double my rents!" if you're in a place without a tightly constrained housing supply.