Can chose to not use heroin and other drugs - like most of society had informed you - and there is infinite amount of data available to anyone looking.
I prefer a society where a stupid decision at that age can be corrected for at a later time. I prefer it over a society that oversimplifies all this to 'choice', going against so much of what we've learned about human nature over the past decades.
[1]: Adults are also idiots. People are idiots. Rationality is our weapon against it, but it's so effective precisely because we're so irrational by 'default'. I'm baffled how people can still hold a worldview where 'choice' is somehow a simple concept.