It has been proven many times over that marijuana affects your judgment, perception of time (as stated by yourself earlier), and inhibitions. All three are dangerous.
How are those dangerous? That's the reason why ppl smoke pot so they can be in an altered state. Unless the individual is operating a vehicle there is no harm sitting around like most users do. Alcohol on the other hand can cause DEATH in large amounts and is much more lethal since you can overdose easily BAC .35 cause death in most people. To overdose on weed you have to smoke nearly your body weight or have THC in liquid form, which are both close to impossible.
If that were true, then underage drinkers and recreational cocaine and heroin users would also suffer from accute paranoia. THC is the cause of the paranoia.
False THC is not cause of paranoia just like the user's mood effects the outcome of an acid trip. Underage drinkers, cocaine and heroin users can also suffer from paranoia if they're faced with the same circumstance.
Research between the use of cannabis and mental illness has also brought significant results. Cannabis use is generally higher among sufferers of schizophrenia, but the causality between the two has not been established. Another study concluded that sustained early-adolescent cannabis use among genetically predisposed individuals has been associated with a variety of mental illness outcomes; ranging from psychotic episodes to clinical schizophrenia. - British Medical Journal 2004, 2005 and Society of Biological Psychiatry, 2005
Actually you read it wrong, people with schizophrenia SMOKE POT because it takes the pain away. How are you sure that the British Medical Journal isn't biased? Most government are against it.
Lesser of two evils. Like using a sample of a virus for a vaccination.
So it's medical value out weighs the cons right?
Same reason the legal age of consent for sex in Yemen is 9 years old. Just because another country has a law doesn't mean we automatically should too. Although I do think it should be legalized.