I'm a huge advocate for and fan of psilocybin but I'd suggest taking some time to read through the Erowid psilocybin trip reports, there are many reports of people inadvertently causing a great deal of grief for others while tripping.
I too am an advocate but willing to bet you some scratch that the incidence of grief, harm, or violence from someone tripping on mushrooms versus a tee-totalling sober population is lower. You went directly to the most formidable source for reporting trips and they even break it down by bad experiences vs good vs etc. so of course you're going to find some stories that exist.
I'd be willing to bet you're right, but I'd also be willing to bet if we go out there playing it loose and fast like Timothy Leary, not much will change, and that would be a damn shame. Just because the risks are low, doesn't mean people shouldn't be educated to the risks, as I'm sure you'd agree, good education on entheogens helps create the foundation for the most important aspects of set and setting. I'm not trying to be a pedantic asshat, I genuinely believe statements like "No user of this product has ever harmed anyone else as a result of using it" are not helpful. Peace. <3