I propose it's highly unlikely that a person who is living on streets is doing so simply because they are lazy.

Imagine freezing in the winter or sweating in the summer. How about worrying about finding food or how to be safe from unstable people, maybe even well off people who attack/kill the homeless. Your claim is that this is a choice out of a laziness and not a mental disorder or an inability to get a job outside of their control.

That's insane

This means that, if someone does become homeless in one of those communities, it is brief and one-time. The communities were able to achieve this by providing adequate shelters and housing assistance both before and after people lose their homes. They also used person-by-person outreach to make sure they found everyone who was homeless and got them housing.

To me, it seems like that doesn't line up with the idea that some people are predisposed to chronic homelessness/resistant to getting housing.