I would like to know the argument for a much more harmful substance than marijuana being perfectly legal in the USA as compared the the arguments for keeping marijuana illegal.
Cigarettes pose a wide range of health risks, including blindness, stroke, heart attacks, osteoporosis, and many forms of cancer and lung disease. Cigarettes contain 599 additives, and function as "a delivery system for toxic chemicals and carcinogens." Nicotine is also highly addictive.
Cigarettes cost our healthcare system billions of dollars each year. 400,000 people die prematurely every year from smoking. When we analyze the harm from drugs, there is no doubt that cigarettes are the worst. They kill more people than cocaine, heroin, methamphetamine and all other illegal drugs combined.