Some people struggling with a substance use disorder benefit from the 12-step model of addiction treatment, but others do not. Explain this in detail.

1. Some people struggling with a substance use disorder benefit from the 12-step model of addiction treatment, but others do not. Explain this in detail.
2. Discuss issues of diversity within the 12-step model of addiction treatment.

200 + words on each prompt. 

Please cite references and use AI Checker as well.