There's some variety of little people myth in most cultures. There's also giant myths in most and there's no mushroom for that.
I think those kinds of myths are just natural progressions of exaggerations and oral storytelling
I think those kinds of myths are just natural progressions of exaggerations and oral storytelling
There is actually quite a large body of research, going back as far as the earliest scientific literature on psilocybin (and LSD), about this exact thing.
Useful keywords: microsomatognosia/macrosomatognosia (feeling one's own body shrink/grow), Alice in Wonderland syndrome (AIWS), and Lilliputian/Brobdingnagian hallucinations (seeing tiny people or giants).
Besides which, if you ever are so lucky as to try a significant dose of mushrooms, you will probably see for yourself that you've been underestimating their significance in our cultural traditions.