And why pray tell would your opinion be any more or less valid than those who believe there is indeed a "method" to fly fishing? Everyone develops their own techniques/habits/strategies to produce results. Granted those who espouse a "scientific method" often do not understand the meaning of the phrase, but your critique seems to be little more than a diatribe against an age old tradition of trying to understand the process of fly fishing, and conveying that knowledge to others. If you do not like the threads that attempt to rationalize fly fishing, then ignore them, but I see no reason at all to discount them out of hand.
I prefer to gather knowledge from all sources, and will evaluate it based on my own knowledge, experience, and by unscientific experimentation on the stream. Furthermore, you gloss over the fact that there are real advantages of learning how others approach the sport which can go a long ways to helping new fishers through the difficult stage of developing their own methods.
Not a bad troll per se, but a bit overstated in my mind...