And yet action gets taken about the rent price fixing, but not about actually encouraging more building.
Last year, Seattle built 20% more houses than the highest of any of the previous ten years. (~13k units) And this year we're 11% above last year, so far.
What about that is not "actually encouraging more building"? I'd say your data might need revising.
Whether Seattle is building enough housing, or whether the region is doing enough to encourage housing development are separate claims.