How about this scenario: In 20 years, this treatment is standard, but there's a catch: it's bundled with a wider behavioral modification treatment protocol, whereby they first reduce the cravings for drugs and alcohol, then they start showing you anti-establishment imagery, and zap the parts of your brain that respond to it.
In fact the second treatment is also standard issue for all those who are diagnosed with oppositionism, a growing mental health disorder characterized by symptoms such as distrusting government authorities and forbes 500 companies. Treatments show a 90% reduction of symptoms and improving quality of life, for example they no longer clash with authorities or make hate statements as defined by the patriot act II of 2028.
Obviously an exaggeration, but there is a real concern. The line is blurry and will be crossed if we let it happen. Taking intravenous drugs for 20 years does some serious damage. It's nice if we develop a treatment for it, but it also shifts the focus away from prevention. People shouldn't be reaching that point, and wouldn't if we were acting on it.