Yeah, don't believe everything you read on the Internet. That list has little to do with actual reality here. You won't see homeless camps of homelesd, almost never see a homeless person and if a homeless person doesn't want to be homeless anymore then they suddenly aren't (I know of precisely one exception to this.)

All that list means is the US vastly under-counts actual homeless people. This is the same well known effect we see in suicide statistics: Sweden just keeps far more accurate statistics.