Posting a link to a spun document from an advocacy group doesn't
actually prove me wrong.
For example, "sleeping in public places not meant for human
habitation" would include anyone who has ever taken a nap in the airport, even one time.
When the piece starts out with an obviously bogus definition, there's really not much point in going through it point by point. It has zero credibility from the start.
Other sources (easily found by Google) suggest that up to 2/3 of the real chronic homeless population has problems with alcohol and/or other substances