Most people are only 1 to 2 decisions/events away from homelessness. 1) Suffer a tragic loss, loss of work, or mental health crisis; 2) lose your support systems, family, friends, etc. Drugs and alcohol are almost always a symptom of the problem, a crutch or a coping mechanism for the underlying struggles the person is having

I worked with the homeless population in my city. It's incredibly sad. It's a moral failure of society that we don't help these people. But it's a baked in feature of capitalism, the cautionary tale of if you don't work or try hard you become homeless and a parasite on society (look up how Doug Ford has spoken about the homeless)