I think this is too dismissive of the transformative power of psychedelic drugs. They absolutely can alter your life permanently. They certainly altered mine. I think, in a positive way. But that power cuts both ways. I also know people who had harrowing, traumatic experiences and developed PTSD.
My advice to people who haven't tried it tends to be that if you're scared, you should abstain. Your presuppositions of what the experience will be, will in themselves shape the experience. If you expect a bad time, you're likely to get one.
There's also a group of people who are curious about using psychedelics to treat mental disorder. My advice to those people is to find a way to do it in a clinical setting. Psychedelics have enormous potential for effectively curing anxiety disorders, but it's not just a matter of taking the drugs. The experience must be guided by a psychologist who knows what the goal is. And then integrated and processed afterwards, also with expert help. Psychedelucs are not a treatment in and of themselves, more like an accelerant of psychotherapy. The therapy is still necessary, it's just that psychedelics allow you to do in a handful of sessions what could take years in a sober patient. As a case in point, I have a severe anxiety disorder myself, and my many self-initiated experiments with psychedelics haven't magically cured it. If combined with therapy, it might have. I'm still waiting for clinical practice to catch up, so I can have psychedelic therapy.