Given the extent to which cannabis can alter thought, we should probably be systematically testing it against all the mental illnesses, with a focus on identify

Given the extent to which cannabis can alter thought, we should probably be systematically testing it against all the mental illnesses, with a focus on identifying the minimum effective dosage. Do we have sufficient evidence to say that cannabis can/cannot treat something like schizophrenia? Is it far-fetched to imagine the vaporizer becoming an ordinary medical device?