Can you force an addict into treatment?

When you see a path someone you love is following – and know where the road is leading, how can you force a change in their lives (this is an adult).
They do not see the problem. In their condition, they can’t rationalize it. Can you do anything? In our society, you can only follow a legal process which forces them down a path where thousands of previous people have learned how to scam the system.
How do you let someone you love deeply die a worthless death?

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