Tylenol is an even better choice: "Paracetamol poisoning is the foremost cause of acute liver failure in the Western world, and accounts for most drug overdoses in the United States, the United Kingdom, Australia, and New Zealand."
Because you're incorrect. Some people face serious side effects. It can trigger mental illness in those that have a predisposition. It can cause HPPD. Here's a report I just dug up for an earlier comment:
>These symptoms persisted for the last 13 years, with little change in intensity and frequency. All efforts at treatment, psychopharmacological as well as psychotherapeutic, failed to alleviate the symptoms. Often the patient was unable to focus properly with her eyes and tired rapidly while performing intense visual tasks – these deficiencies being detrimental to her studies and professional work as an architect. As a consequence, the patient became depressed with latent suicidal impulses. She also found it increasingly difficult to distinguish between ‘normal’ and ‘ abnormal’ perceptions.
Psychedelics radically impact cognition and consciousness, and not always in a safe way.
It's not always just a 'woah man' giggling in a park.
People climb high things and fall. They run into traffic or harms way. They often attack first responders that are attempting to deescalate.
Thought loops are dangerous and psychotic breaks are an obvious possibility to anyone who has done these substances.