I'm not saying you're wrong per se but what evidence do you have that there are no beneficial analogs and triggers for similar biochemical pathways that perhaps are not marked by a substantial or profound classically psychedelic experience?
This is why various pathways like ayahuasca, mushrooms, LSD, mdma, Holotropic Breathwork, EDMR etc all work from vary different pathways — they all enduce an altered state, in which the nervous system releases the experience and forms new pathways.
Some great books are:
The Psychedelic Explorer's Guide- James Fadiman
Acid Test - LSD, Ecstasy, and the Power to Heal - Tom Shroder
Sacred Knowledge - Psychedelics and Religious Experiences - William Richards