Yes, the regulators want to. The people actually doing the research want to be able to focus on the components that are in marijuana, because some of the chemic

Yes, the regulators want to. The people actually doing the research want to be able to focus on the components that are in marijuana, because some of the chemicals that are produced in small quantities seem to have substantial effects in certain conditions. A simpler organism, like yeast, means they can minimize the variables, and provide better research and better quality.