Why should marijuana be legalized?

As a stoner, I feel obliged to explain why weed should be legalized;
Alcohol, a man made substance, is legal. This drug is much more addictive, and causes so many more problems (cancer in more than one form, brain cell damage, etc.), and is just as effective on the psychosis of a user as weed (if not more). Cannabis as it's known, is a natural drug, a plant, which contains cannibanoids, which are already present in our body. Without them, our organs and entire biology would be different, and work in a different way (possibly not better, I can't say). The psychological effects of marijuana are only caused if there is a psychological problem present in the first place, whether it be known to the user or not. Although it does kill brain cells, this is all during the ingestion of the drug, after that, while under the influence of the drug, your mind is convinced to learn more about itself, and your creative juices flow. Not to mention the opening to a spiritual side of yourself you might not have even known you had. On top of all this, alcohol is a highly addictive depressant. Marijuana is a (not highly) addictive anti-depressant. The dangers of smoking weed are also mostly caused by the way you smoke it. In a 'spliff', you usually also have tobacco, causing a majority of the problems. Through a vaporiser however, the drug is next to harmless, and can even be used as a drug to help people who thought there were no other options.
Also, the entire 'war on drugs' is bollocks, they're just trying to make you pay for drugs, almost like saying 'Don't use those drugs, use our drugs, they're better' when in fact a headache will be easily cured by a smoke, and will take a while with a paracetamol or two.

Remember, just because you're paranoid, doesn't mean they're not watching you.