It will begin to make sense if you understand that techniques don't work but principles do
A principle starts as a theory (your own) and if you test it, it sometimes will work, most of the times not.
Then you'll discover more and more theories, some successful ones, mostly failed ones. Then more and more principles. There's no end to the cycle of searching, trying, succeeding and failing.
You'll then somewhat observe that a technique is just an amalgamation of principles put together. And every technique is similar but not the same. Over time, by being aware, decades of repetition and experimentation, incorporating the successful principles while rejecting the failed ones in our techniques WE become the principles.
This is my theory anyway