That's the point: drug prohibition is inherently immoral because it denies an adult human being agency over their own body. It's mine to destroy if I see fit; it's mine to build it I see fit.
There is no victim, for example, if I decide to cut off my finger. No one has been wronged, and no crime has occurred.
If you think drugs should be illegal "because addiction", then at least be consistent and go after tobacco and alcohol. Tobacco kills 10x more than opiates in the USA, and alcohol 6x, but somehow it's the opiate epidemic that makes the news.
Once we can agree that a) the law should be fair and consistent and b) adults should be allowed to drink alcohol if they want, we can get to c) people should be allowed to drink any damn thing they like and it's nobody else's business.
