Pot is an insult to your body as your lungs are designed to breath air, and it is sure to have
long term deleterious effects. I know it makes you rebellious, but that is because it is a mind expanding drug. It makes you ponder things to a deeper level than you would without THC inducement. You may overthink insignificant aspects of something; slowing down your solution process, but it may give you a further insight which may prove beneficial.
The most obvious argument, and what applies the most gravity is the fact that criminalizing it does not reduce the availibility - if you want it, you can find it after 30+ years of the drug war! So you add all the negative aspects thereto which are horrific, and the pot remains. You create a black market which make the cartels rich - these are wickedly violent people who threaten our national security, and they didn't get that way from smoking pot! You create a sub class of recidivist; felons who have an indelible record which will hinder them from full societal contribution - for what? Incarceration destroys families, and breaks hearts - often little children who are forever scared - for what?
If you tell me I can't drink a Big Gulp - **** you! If you tell me I can't soke pot, or my dogs shit - **** you! I'll eat it if I want to
I can't believe what I'm getting here: Pot is bad so it should be criminal - booze is not so it should not be

Go to an AA meeting, and listen to empirical evidence of how so many lives were fucked up by booze. Look at the drunk driving statistics. Better yet, look at films of dead children who had to be extricated; cut out of wrecks. Alcohol lowers inhibitions - it causes people to do all sorts of regrettable, irreparable things! Go park outside of an inner city liquor store on a Saturday morning, and watch the winos all lined up sporting their big piss stains, and their pittyful atire.
How would a drinker react to alcohol being criminalized using the same criteria? Go loook in the mirror - expand you minds. Don't look through tunnel vision utilizing disingenuous logic, and cement an unintelligible position - you will look like a dumb ass hypocrite!
I think life is better without chemical inducement of any kind, but I don't begruge anyone for living their lives if they don't victimize others, or put them in harms way - they are entitled.