To me weed is a divisive and petty thing to fight about. It also gives the left power over us. If weed is illegal, alcohol should be illegal. I understand it is not healthy, but we have the right to choose....it's between G-d and us.....
While you are right you are wrong. In your form of logic anything is ok and its a choice. Having sex with goats is a choice and there should be no laws about it since well men can engage in homosexuality so what's the difference? It's a victimless crime.
In Judaism, right is right and wrong is wrong. Judaism isn't left wing nor right wing nor libertarian wing nor socialist.
If it is medicine to save a life, then fine. If it is used for non medicine, it's bad.