As far as I know experiments of CBT + psychedelics have shown very promising results for treating PTSD and certain kinds of depression, specially in people that

As far as I know experiments of CBT + psychedelics have shown very promising results for treating PTSD and certain kinds of depression, specially in people that are about to die and need to come to terms with that. These are not microdosing experiments though. The usual way it is handled is that you get a few weeks of CBT then you get half a dose and the following week you get a full dose followed by more weeks of CBT. There is no placebo effect here that's possible because, well, it is impossible for someone to believe they have taken a full dose of pscychodelic drugs and not feel anything. But you still have a control in this case because you have a group that goes through CBT and another group that goes through CBT + drugs. In fact, from these studies there have been very little "bad trips", mostly I guess because you have the half-dose session and then the full dose session in a very controlled environment and so on. These experiments are obviously done quite responsibly. So I think you're mixing things up a little bit and I would suggest doing a little more research in the topic. Psychodelic therapy, at least the kind that is being explored seriously is not really done through microdosing.