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Erowid is a great resource for these sorts of questions: https://erowid.org In fact they have an answer specific to your question on mushrooms: https://www.erowid.org/ask/ask.php?ID=1606 In short, there is very little risk but whether or not someone should choose to take something should still be an informed choice. As far as risk to life, there's been few or no reported deaths purely due to ingesting psilocybin. How…
They are not doctors. I would not trust that website as a source of medical advice.
However I work with doctors, and through that have had the ability to discuss the site with various medical doctors. In general, they have also noted it as a good resource. They've also noted there is limited ability for them as medical doctors to assess the medical side effects of various drugs due to the illegality of them in their jurisdictions. Thus, the need for resources such as Erowid. If you want your medical doctor to be able to give you medical advice about psychedelic drug use then help push for continued legal reclassification of and access to psychedelics for medical researchers.