Charles,
FWIW, if you look it up, you will find that the addictiveness of both alcohol and nicotine to be greater than that of pot. You will also find that usage under the age of 25 is not recommended by any respected science that I've seen.....for any of the them.
And if you look really hard at straight line statistics about deaths related to abuse or overuse of pot and compare that to alcohol or nicotine, well, you'd be amazed. Alcohol poisoning/OD kills many, many kids each year, cigarettes cause innumerable health issues and pot causes.......munchies?
It doesn't matter because you won't believe me. I was in your position just over a year ago. Then I had need to do much research. It is really stunning if you allow yourself some time to think beyond that which the guvmint and big pharma and the DEA wants you to believe. But that won't matter until you actually have a reason to figure it out for yourself. I figure I was about 12 months late. I hope that you are more timely than I was.