You're getting downvoted but when I do psychedelics I take a small dose of opiates to ensure it doesn't spiral into fear and paranoia. If the goal of theraputic use of psychedelics is to create a deeply seated positive experience, I don't see why mixing a little bit of warm fuzzies into it would be determental.

>I mean if you're already planning on giving a terminally ill person LSD, why not slip them some MDMA, benzodiazepines, and opiates, too?

we do give many terminally ill people opiates, a lot and of very strong opiates. What do you think fentanyl is? An illegal drug to cut heroine? No. It is a very powerful medical drug prescribed to cancer patients in particular (especially toward the end when less powerful opiates start to be not enough - IANAD, just common knowledge)