Stable housing is the objective for assisting people who are homeless or in the processing of becoming homeless.
However, some people who are having major difficulties and are in considerable distress wouldn't be prepared to go into social housing, even if units were available or for resale. A connection has to be made with these people in the street. They have to be led to integration or reintegration centres and to work on developing life plans. These people have experienced a number of major break-ups in their lives and have dropped out as a result.
When you're in a survival situation, you give up. Aid services are necessary. Like the fight against poverty, the housing issue is a structural factor in solving the homelessness problem.