I don't think the article is arguing that the specifics of what people see in an LSD or Psilocybin trip are of significance. Rather it's the shift of perspectiv

I don't think the article is arguing that the specifics of what people see in an LSD or Psilocybin trip are of significance. Rather it's the shift of perspective that often results that can be of benefit. For someone with an incurable illness, the fear of death might make their final years unbearable. An experience that deemphasises the self and puts life in context (which is what some have described) seems like a valuable treatment.