Maybe his wife divorced him, out of the blue, because she just got board. He was a good provider, good father, he treated his wife well, but she nonetheless, got board and felt she needed to move on with her life. He loses his kids, house, thousands of dollars. He loved spending time with his children, every day. He was a great dad. She divorces him and moves from South Florida to Seattle, with his kids. Horrible. He starts drinking, hanging out at the bar, with the wrong crowd. Ends up destroying his life, because he lost his will to live, without his family, his wife, and children.
Bill served three tours in Afghanistan, two in Iraq. PTSD, and a host of other conditions and he comes back and starts drinking to numb the pain. He has sleeping problems, gets hooked on benzos because they help him sleep. He ends up homeless.
Betty was an unwanted child, raised in foster care, and by the time she was 12 she had been in 30 different foster homes. She suffered sexual abuse by one of her "foster brothers", and also by an old man that ran one of the foster homes. She's emotionally disturbed, starts doing drugs, gets released from foster care at 18 and ends up out in the street. Take a look at the post I posted a few posts back, with all of those videos of former foster care children, who are now homeless.
Tyrone was born and raised in the inner city, his mother was a crack junkie prostitute. I'll leave it up to your imagination what type of life Tyrone lived and he ends up homeless on drugs. You simply don't know.
When I was homeless, I stayed at the Borden Ave Veterans Shelter in Long Island City Queens, and I met a former Naval captain, who captained a destroyer, in the 1960s. All types of people are homeless, even you or someone you care about might become homeless. You don't know what has happened in their lives. Abandoning them leads to more problems for everyone, it's more expensive than housing them and providing them with a foundation upon which to rebuild their lives.