Think of all the speakeasys that opened during the last prohibition. It makes criminals out of ordinary people who would just enjoy a glass of wine, or a beer after work.
It puts too much power over our personal lives into the hands of the government. It makes people who make, supply, and sell the illegal substances rich, creating an underworld of crime.
We can’t make everything illegal just because some people will abuse it. People who are going to abuse alcohol or pot or other drugs will usually do so legal or otherwise. And many teens try something simply because it is illegal, its part of their rebellion. Its not nearly as much fun to do something that’s legal! Let’s face it!
We all need to be held accoutable for our actions, drunk or sober, stoned or straight. Driving under the influence does need to carry a heavy penatly to discourage it, and we need very stiff laws for harming others, no matter what our state of mind or soberness.