When you are dying of cancer, a bad trip is a small inconvenience. A therapist will make the chance of that very small anyway.

Yep. If psychedelics were to be given to terminally ill patients it's fair to assume it'd be under the guidance of someone who knows how to help things go well and in a comfortable environment. It probably wouldn't involve said person dropping a full dose and hitting a concert only to find the rest of the crowd are ogres and the music is stabbing them.