I think because Marijuana has alot more benefits for being legalized then shrooms do...shrooms are mostly just for recreational/spiritual purposes.
honestly i think its because mj is actually on its way to be legalized...whereas shrooms are gettin stricter laws in other countries...and have no chance of legalization here right now
When-O- When, will the government realize that they have no right to tell another human being what they can do to their own body and/or mind. As long as people are responsible in their use, any substance can be used responsibly. Getting punished for victimless crimes is rediculous.