Not interested in your moral prescriptivism. Whether the US federal government enforces its borders or not is entirely separate from the question of of it does

Not interested in your moral prescriptivism. Whether the US federal government enforces its borders or not is entirely separate from the question of of it does. It can and does. San Francisco can't and doesn't. If it does a lot to help the homeless nation wide then the levels get impacted nationwide. If SF does a lot to help the homeless in SF then rates start the same or rise as move homeless move there from elsewhere in the US. That being a good thing in general is entirely out of the scope of getting the homeless off of public transport.