>I think there are a lot of people who would have trouble with that knowing that person could be their own child, an ex, a parent, a friend, or themself
Every downward-spiraling addict has had parents, friends, and maybe children. How would they feel watching their loved one rot away on the street (or a bus) in the grip of addiction? It is inhumane to watch people shoot up heroin and drink themselves to death day after day in public spaces without intervention.