[user104658]

The vast majority of truly homeless people (i.e. literally sleeping rough) have addiction and mental health problems and have basically "fallen off the grid", have no one who wants to help them or can help them. It's pretty tragic.

Even more tragic is that there's a huge problem with homeless teens, usually late-teens who have had abusive relationships and have either run away or been booted out on their arse at 16 as soon as the parents no longer have legal responsibility. If these kids don't already have addiction problems, generally it's only a matter of (a small amount of) time until they do.

I feel awful for them, but the issues at play here are go so deep into the root of the absurd human condition that I wouldn't even know where to start.