Given your assertion that both programs are "not working", it's hard to explain why Prohibition lasted only 13 short years yet drug prohibition has been going on for 70+ years with no end in sight. Every survey I've seen says that people don't want to change it.
You say drug prohibition "isn't working". What do you mean, "isn't working"? Are you saying that if we legalized all drugs, drug use would remain essentially the same?
Anyone who wants any substance can get it anytime they want. And more people use them than did before your famously "successful" war on the citizens who use drugs.
Not to mention, it has made the situation worse in myriad ways, including but not limited to, destroying liberty, trampling rights, corrupting the police and politicians, fostering an unhealthy disregard and disrespect for the law and the authorities, and enriching the lowest and most violent people in society.
I'm sure that "works for you", but it sure doesn't work in any real way.
It sucks worse than drug use, and the people who support it are hypocrites and they suck even worse.
Most of them are former or current users and dealers who won't admit their crimes while they advocate the imprisonment of those who have done precisely the same as them but had the misfortune to be caught.
UN-Apprehended drug criminals have no credibility when advocating for the WOD.