They force otherwise law abiding, harmless criminals into rehabs so they can use it as a statistic that "treatment rates for marijuana use have triple" and say "see, people are addicted to marijuana look at everyone who went to rehab for it".

A friend of mine fell victim to this, he was a fucking idiot and screwed himself, they sent him to a rehab where they brainwashed him basically encouraging him to smoke cigarettes but no drugs of course. (Despite nicotine being a drug more addictive than heroin)