What has happened with alcohol and tobacco is a hell of a lot better than what's happening on the black market with drugs made illegal. Beer companies don't go to war with each other and settle disputes with violence.
The war on drugs, is really just a war on people and the market itself. More specifically a war on people's choices about their own bodies, and not through persuasion or medical intervention but through force. The ends don't justify the means.
First, it's because the war on drugs isn't being fought the right way. It's a half-measure approach destined to fail from the start. That's my point.
Second, if people who choose to use drugs were only impacting themselves, you might have a point. But we all know that's not the case.