Homeless despite Yale degree; mental illness? drug addiction? choice?

It would seem, @milee30, that the subject can decline alternate services and lodging because he has a reasonable (to him) legal alternative of living on the street. If that option were no longer available to him, presumably he would either partake of the offers or seek other solutions. California cities are known for offering many social service options. If the subject refuses them all, why is he permitted to use sidewalk space for a purpose for which it is not intended?