I don’t know exactly the details of “try” to solve homelessness crisis in Seattle. But the main thing is to build more housing. A lot more. Public and private sectors. It probably means better zoning and better incentives to not just build luxury housing.
It isn’t punishing people for being homeless, especially when they don’t have other options. Best case, that means they leave the jungle and go somewhere else. Maybe a sanctioned place, maybe some other unsanctioned place, maybe another city or the suburbs.