You are right,,, it will work.
I began reading his series in 1991 and I was at a loss...
Until I remembered, no matter what you think, there will be no change if no action is taken.
I discovered it was simple-but-not-easy. But, it has worked well for me and still works.
Hence, IMHO, he didn't write any fiction.
Much of the DJ-Teachings were verified by my Dad and several of my brothers.
None of them mentioned the "magic-plants".
However, I have very-little faith in Magical Passes or The Active Side of Infinity.
I view these as the works of his cohorts,,, the New-Age movement, mostly drug addicts.
One reason is, they ignore-the-handicapped who cannot perform the moves and positions.
The "raw-data" from DJ doesn't ignore the handicapped.