Not necessarily, someone could have an awful childhood but with adequate mental health help and support, not fall into addiction and homelessness in adult life.

Not necessarily, someone could have an awful childhood but with adequate mental health help and support, not fall into addiction and homelessness in adult life. Ideally, yes, we'd eliminate all causes of trauma, but we can also put a _lot_ more effort into mitigating the effects later in life, rather than (subconsciously?) chalking it up to a moral failure in the affected person.