Making it illegal clearly did work. Rates of alcoholism, alcohol-related trauma (e.g. drunk driving), and other societal ills dropped dramatically during Prohibition. It was a stunning success in demonstrating alcohol's highly destructive impact, and how society improves when its access is limited.

That limitation wasn't perfect however, which is what you point to as not working. Yes there was organized crime trafficking of alcohol but it was still far less available than before Prohibition. When a policy leads to dramatic improvements in society, but isn't perfectly implemented, that doesn't mean it failed.

You have been fed a false narrative your entire life about Prohibition that doesn't withstand the slightest scrutiny. Prohibition may have been unpopular, but it didn't fail. It was repealed because government wanted the tax revenue they didn't get from bootlegging, and lobbying from business interests.