What really gets me hot under the collar is how people want to dismiss these things as old fashioned or outdated. That's like saying "oh, we don't need to train doctors in physiology, biology, anatomy, chemistry, to prepare them for operating- they just need to have good interpersonal skills". Or the bridge builder/architect who doesn't need to study physics, etc. It's hilarious (not really) how often people confuse music with some artsy fartsy "anyone can do this" philosophy and dismiss the fact that its system is as deep as any applied science. These techniques were developed because they sounded good! And they were built upon for several hundred years. But, no, in the space of 2 decades, we have seen a dramatic disintegration of any respect or value in the system of music.
I agree and have been harping on about that for years - no historical knowledge of just about anything. Yes, you have to move with the times. But these times we are moving in at the moment are an unmitigated disaster when it comes to any kind of art. Art has more or less reflected society throughout the ages.