I hardly call banning a hazardous and crime provoking substance "tyranny".
But, if you insist, lets just do away with all laws that regulate behavior (and they ALL do) and just have anarchy. Lots and lots of liberty for everyone!!!! But no safety for any but the richest and the most heavily armed.
The question is not if we will have laws that regulate private behavior, we will, the question is, Where is the line.
If Iran and China can't control their addicts, how much authoritarianism would it take to control the addicts here in the USA? Even doing away with Habeus Corpus and the Right to a fair trial wouldn't be extreme enough, as witness China and Iran.
How about deputizing 100,000 yahoos to shoot suspected dealers/users on site? That would destroy our nation faster than any drug habit could.