I don't know how the government can claim with a straight face that these substances have no known medical use, and are harmful. That's the criteria I think for Schedule 1, but there are clearly known uses for them, and the harm is relatively low. I really don't like thinking, "the government just wants to ban dangerous thoughts" but mushrooms - really? Compared to alcohol they are so incredibly safe.
The main fear I think comes from the majority of people who are not that bright and can not cognitively handle the type of thinking that comes from psychedelic use.
Imagine if you just listened to the gov your whole life and then after taking psychedelics u start questioning what is good/bad , what is true/false.
Before you know it, flat earth theory is real.