There are two aspects to the type of question that was asked. How do you prevent people from ha I g to make choices which are rational and good for their options but still really bad overall, and how do you convinve/educate people about available options they weren't aware of so they don't make outright bad choices when better ones are available that they are unaware of.
There are many possible answers to "why did you take off to the west and ride trains and sleep in parks and steak to feed yourself", but most of them aren't "well I just felt like leaving my entirely stable, loving and supportive friends and family." What to an outsider seems like a poor choice to a specific person imight seem like the decision that saved their life, even in retrospect.
I dont know if you intended to reply to the OP/author or my reply. In my case, I dodged hard drugs for $reasons and can safely say that I chose my own adventure. I was had anxiety and apprehension about status quo and what was expected of a HS graduate circa 2000 so I said F it and did my own thing.