There are some drugs about which good arguments can be made on both sides of the legality issue. Highly addictive ones do indeed ruin lives, and while there is an argument that that should be the person's choice, the other side can argue that the government is there to better the common good, and that can include protecting people from their own bad decisions. I have mixed feelings about the legality issue when it co…
Please bear in mind that the origins of drug prohibition had little to do with "protecting" people, and were instead instruments of oppression. Drug abuse a health problem, not a criminal problem. We spend orders of magnitude on the criminal side and, guess what? It only makes things worse. Legalize. Regulate. Tax. It's very simple, and is the only correct answer.
Laws aren't always about crimes, by the way. Not wearing seatbelts or motorcycle helmets shouldn't be seen as a criminal problem, but we still have laws about it. Maybe you disagree with those laws, and that's fine.
I think it is less fine to say that your perspective on the issue is the only one that can be reasonably seen as valid.