So what does it mean to say that a procedure is workable or it isn't workable? Or to promote that something is “100% workable on all cases!”
Only God Knows, lol. (just kidding).
It seems to me your (beautiful) question presupposes at least 2 inherent issues that are not immediately evident, nor ultimately disclosed. #1. That workability (and or it's opposite) exists absent Consciousness Itself, and # 2. See #1.
Mr. Hubbard, I believe, at some level of his being, at some point in time, shared your enthusiasm for 'fixing' human beings. Which inclination is an inspiration. Though fatefully flawed via Karma I believe (as a possibility) in time.
If, as Mr. Hubbard asserts, each individual is the sum total of all that every was, is, or will be, i.e., the formless, timeless, infinite, 'Static', appearing first in the form of Theta, and last/now in the form of MEST, no one needs Mr. Hubbards help, to become what that One, already is, was, and ever will be. Millions of dollars be damned. Lol.
As a practical matter I would say just as water seeks its own level, the workability of your offering to the world will be equal to the workability of your offering to yourself.
Which Hubbard proved to himself.
Which we all, in time must do.