"Homeless by choice" is a long disproven myth. There are exceptions, of course, but often young people experiencing homelessness are on the streets because they were explicitly forced out of their homes by their guardians or were forced out because of sexual abuse.

From an article in Hoodline, quoting Mary Howe, founder of the Homeless Youth Alliance,

> [San Francisco's Haight Street] is an international destination for youth who come seeking refuge from abusive families, alienating foster care and group home situations, and juvenile justice system involvement. These homeless young people encounter constant threats to both their physical and mental health while on the streets.

https://hoodline.com/2015/03/getting-to-know-haight-street-k...