> a common excuse: Blame some hidden susceptibility, not the drug

It's the interaction between that person and the drug.

I have a crustacean allergy. That doesn't mean crustaceans are bad, or other people shouldn't eat shrimp. It just means it's a bad mix for me.

One of the benefits of administering psychedelics in a clinical setting is that telepathic nonsense is more likely to be noticed early and corrected for, whether by reducing dosage or suspending treatement. (And treating it as medicine allows us to study those people who react negatively to it, further reducing harm.)