Isn't this exactly the kind of response that the blog author is calling out? I have a friend who had no history of mental illness or prescribed medications and had an absolutely horrific trip that left him very unsettled for a good few months. The issue is that responses like this deflect onto other possible causes rather than accepting that sometimes people who could never have known differently can have truly dreadful experiences. I say this as someone who has had universally positive and very meaningful experiences with psychedelics, including LSD.