No, that is not what I'm saying. Notice, I never said we shouldn't do anything.
I'm saying reaching the state of "no homelessness" is dependent upon finding something to do with the worst of the homeless.
For a tech analogy, imagine you've architected a system that has 99.5% uptime. You might be able to imagine a way to get to 99.9% up time.
With enough resources, you might even be able to get to 99.99% uptime. With laser focus and a giant dedicated team and an immense budget, maybe you can get it to 99.995%.
But what would you do if some exec came in and said we need 100% uptime, and we are a failure as a company unless we reach that?
In which case you're essentially saying "meth users decide everyone's housing status".