Addiction is a brain disease. This is not a moral failing. This is not about bad people who are choosing to continue to use drugs because they lack willpower.
Oh, and one more thing: If I try something that I've never done before, something that's particularly difficult for me, and it doesn't work out, that doesn't make it a failure. The fact that I actually succeeded in finishing it makes it a huge success. Think of all the people who never even try.