I’m not so sure that they are wrong.
Has making drugs illegal ever stopped addicts from getting them.
Did prohibition stop the use and manufacturing of alcohol.
Was it better when weed was illegal.
I don’t use drugs at all, I prefer a glass of wine or a cognac but I think making weed legal was a step in the right direction, at least now people are not arrested and jailed for something that is no worse than ordinary cigarettes and alcohol and they can get it from a government store where they can be sure it is safe for them to consume.
Perhaps making it legal for a small amount will stop a lot of the criminal activity surrounding drugs and if it can be administered in a safe hospital setting all the better and perhaps introduce a program to help addicts get off it at the same time.