I don't care to make a "case". I'm interested in any examples of contradictions to this claim. So far my interest has not been satisfied in this thread...

The absence of evidence does not indicate evidence of absence.

Physical harm is rare in psychedelic experiences. Psychological harm is very, very real and has destroyed peoples lives when they get too carried away using psychedelics. I agree that these compounds should be legal, but to say they are 100% safe is ridiculous.