Because people realized that people who want to fulfill their own selfish desires are going to do it (drink alcohol and/or smoke pot), anyhow, anyway. So, they didn’t pass the law to prohibit drugs. That is what YOU and others are, selfish, who support legalization of pot.
Is selfishness bad?
Or is it just “bad” selfishness when someone wants to do something that doesnt fit into your ethos?
That’s a nice try but you avoided explaining “why” no Constitutional amendment was required to prohibit drugs and yet it was necessary in order to prohibit alcohol. Here is a hint; there was a legal reason for AMENDMENT XVIII. They didn’t go through the arduous and risky means of a Constitutional Convention for fun.
Then how did they get to be illegal? All drugs were legal at the turn of the 20th century.