This is correct. They are treated like children with curfews, bed, and room checks. Many places (shelters) are first come, first served, so while you may have somewhere to sleep tonight, you may not be able to sleep there tomorrow. The housing also mixes many different people together who may steal your belongings or assault you overnight. The encampments create small communities of trusted and "like" people. Moving them also removes that trust. And yes, drug rehab programs, job seeking, clothing, food, are all programs already offered by the city to address the issue.