Often the most important thing to reassure people who are having a bad trip is that this too will end, and they will feel normal again soon. The fear that the trip will be the new normal is a big fear.
Sometimes people are having bad trips because they are performing the introspection they've long avoided--- they're facing trauma. And in that respect, I think that having a bad trip is actually a _good thing_. Sure, you aren't avoiding what's in your subconscious, you're facing it head on. You might have a bad time in the moment, but it helps the healing process overall.
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The idea that trips are just a beautiful illusion is... kind of flawed. Our brains are weird, and our thoughts can re-wire how our brains work. If someone is living is the cognitive distortion that they are unloved, but a trip of MDMA reminds them that there is love and unity in the world, then it doesn't really matter whether it's an illusion. Going through life with the belief that everyone is capable and deserve of love and unity and respect _fundamentally makes your life better_, especially if you compare it to the opposite distortion, where you are paranoid and wondering how people are out to take advantage or humiliate you.
I think that MDMA is more about breaking down cognitive distortions with a temporary "well what if PLUR??" thought experiment than it is about just creating an illusion.
Psychedelics are an effective means of clearing the filter of all the constraints a person accumulates in the course of life. Culture, society, education, religion, it all serves to build the filters up.
If one finds beauty in the world under the influence of psychedelics, in my experience it tends to persist long after the drugs have left the system.
I realize that's a pretty extreme statement to make. But from what I understand, we hardly realize how the mind works. I am not saying don't dismiss the research. I just wonder if we are trying to sell psychedelics as a magic pill, when maybe just awareness is all you need.
What about people who have bad trips on these drugs? Do we dismiss them as people who aren't just suppose to take psychedelics?