I've not done more than cherry-pick from them, admittedly, but I've always had a pipe dream of writing articles about concepts within, as a way of teaching myself.
I don't think practicality is a necessary component of truth. It may be true that, should you stumble upon a way to deliberately practice something, you will grow your mastery of that thing regardless of talent, and it may also be true that finding a way to deliberately practice something is nearly impossible without decades of effort.
What I believe you're talking about is called "tacit knowledge" and the work around how people can effectively transfer that knowledge from one person to another. One classic anecdote is of the pilots who were able to find success by "pretending" to be their instructors -- doing exactly as they thought their instructor would do, without really knowing why, and obtaining more positive evaluation results than by trying to do everything "as themselves".