I completely agree with your view provided you are trading FX and not stocks. I had to re-tool my whole trading approach to FX once I understood how institutional traders were approaching it. The problem I think is because most trading books are written by retail traders. Basically retail traders approach from the premise of "how" and not "why" in positioning trades.
Technical analysis is an easy sell and with more options than there are numbers in the lottery it is like a rabbit hole without an end. Once you enter you are doomed. I don't know other markets well enough to comment outside of understanding correlation and its importance to understanding why fx might be moving in the absence of data releases or an obvious sentiment.