Mobsters commit those crimes to protect their profits around distributing things people will want if or if not they are legal. Murder and theft are not things that have mixed benefits and dangers, they are always wrong and always dangerous.

Do you think cheese should be made illegal? It clearly has benefits but it can become addictive and has serious health risks! Maybe we should try outlawing it and you'll see the "cheese mobsters" crop up overnight almost immediately.

It's precisely because I want to see less murder and theft is why I think certain substances should be legalized and regulated. STOP with this "Oh you just are pro-crime" nonsense. It's a weak argument. I'd rather deal with the risks of pot, cheese, prostitution, etc out in the open rather than give a monopoly to criminals. It's naive to think that making something illegal means there will be less of it. Case in point: prohibition. 

These things are all easier to deal with when we remove them from the shadows.