My interpretation of the allegory is the oppositeof the OP's:
Eating of the tree of knowledge led to the emergence of distinct entities, allowing us to learn by observing stuff ('isomorphically', the universe fracturing to know itself), but as a necessary corollary, separation of humans from god/the universe (ie, expulsion from Eden).
This describes ordinary experience before psychedelics intervene.
as far as the garden of eden goes... the two unique trees were the tree of the eternal life (eat of it and live forever) and the tree of the knowledge of good and evil (eat of it and you will surely die). it was not the tree of knowledge in a general sense. it was specifically the knowledge of good and evil through experience.
I don't have much knowledge in christian theology, but through my own philosophy I interpret the garden of eden allegory to symbolize the creation of perception. Without apparent polarities, such as good and evil, there is nothing binary or relative that the human mind can perceive and experience. If one ate from the tree of eternity, they would experience the opposite of polarities, they would experience the absolute, or the eternal/infinite, and consciousness would be in its natural form as one with God (in a state of paradise/Eden). By eating from the tree of knowledge we were separated from god/the universe (expulsion from Eden) which created separate entities, or polarities, which allowed us to perceive and observe through duality, and gain knowledge through the experience of polarities such as good and evil and finite concepts such as beginning and end (living and dying).
These two trees seem to symbolize our natural state and our present state. Eden is the natural state, the union with God, and is absolute and infinite which equates to the tree of eternity (eternal life). Expulsion from Eden is the separation from God, and our consciousness is finite rather than absolute (living and dying), and experience is only possible through binary terms of polarity, which equates to the tree of knowledge of good and evil.
in my experience it is near impossible to completely and fully explain what you have learned to anyone else (or even yourself at some other distant point in time) simply due to the fact that the knowledge made the most sense to you when you were in that state of mind.
It is extremely difficult and takes mental discipline and intense reasoning but after much experience, reflection, contemplation and integration one can almost completely explain the
knowledge gained from psychedelics, but it is hard to understand the exact
mechanism for that knowledge. It takes years of integration usually, and even then many people still can't fully explain the insight psychedelics have given them. Even when one can explain the insights they are given from psychedelics and feel fully confident in their logical understanding of the psychedelic induced insight, many still find themselves completely unprepared when faced with the mechanism of this insight in subsequent trips!