I also thought of this, yes. But it was more along the lines of psychedelics being extremely hit or miss. The only drug I know of that is ritually mass-prescribed for spiritual insight is ayahuasca, which I understand is also rather unreliable.

If I were to suggest a drug for denial-busting, it would be MDMA, hands down; it removes fear barriers. (I have no idea why people decided to use it for dancing, of all things.)