One of the major arguments in favor of legalization is in direct opposition to the black market. Many people think that a well regulated supply and marketplace

One of the major arguments in favor of legalization is in direct opposition to the black market. Many people think that a well regulated supply and marketplace is strictly preferable to criminal enterprise and everything that goes along with that. It's perfectly consistent to be anti-black-market and pro-legalization. Succinctly, it's okay to want to change the law, and also favor rule of law.