That was not the logic of my comment, and it seems like you didn't try very hard to consider what I meant. For example: the "interesting and thoughtful" article linked describes Finland's "Housing First" model adopted in 2008. Guess what: Housing First was first introduced as a policy idea in San Francisco in 1994, adopted as de facto city policy about ten years after that, and set as statewide policy in California ten years later. Ten years later, the problem is worse than ever!

Perhaps Finland and California are different enough that looking to Finland as a policy playground is a waste of time. This isn't physics; it's political economy.