“If, as a society, the U.S. decided to enforce the law like Singapore, that would make the U.S. a very different country.”
Well, yes. Pick your poison:
1. sacrifice some of your freedoms in exchange for a “cleaner” and healthier society, or
2. Keep your permissive “freedoms” to do drugs and end up like Portland or San Francisco.
The question about the legalization of weed has more to do with finding out the best way to deal with this "poison."
I am not saying that legalization is a surefire solution. But prohibition and the War on Drugs haven't worked very well either.
I know a lot of former drug users and former drinkers. All agree that drug and alcohol use/abuse is a serious problem. Most, including myself, had a serious problem at one point. None--no, not one--believe(s) the government is the solution to that problem. None decided to kick drugs/alcohol because of the law or the government.
“I prefer dangerous liberty to peaceful servitude’’.- Thomas Jefferson.