imo, some people have some basic wiring, alchemy, etc., already in place - and so its most appropriate and effective to just do something. And, for that person, working on preliminaries is, like, "what for?". Usually, that person doesn't even know all the parts that've 'always just been there' for them. (This is often a real problem with advanced teachers, btw: they often just don't understand all the pieces that their students are missing.)
Some other person might have this or that piece missing, which precludes "just doing it" - and so has to work through finding that piece, finding an effective technique for that piece, and doing the work to put that piece in place.
