My experiences are quite different. Since I loved being physically healthy I never smoked more than once or twice a week and - as I've gotten older - I've cut down until now months go by without a hit. I tried many other drugs but immediately dispensed with them as too difficult, too dangerous, too expensive, or not what I wanted. Pot was never more than interesting entertainment and mildly performance enhancing under the right circumstances.
My point is not that you were wrong and I right but that individual experiences are different. I don't want to be prohibited from enjoying pot because you can't handle it. Nor should I be.