I see both sides of this debate. I'm glad that Jemaz brings up the points he's making, though I am a big believer in using video. On the other hand, some of the language used to discuss hitting causes me to read real hard. Many things could be described in much simpler terms IMO. We are not all scientists. Some of us (me) aren't very smart at all.
It does help to understand how the body works and the physics involved, but can those that understand it all, HIT? For that matter, can they all teach hitting? You can know what all the movements are, but you can not teach timing. If you could, there would be a lot more great hitters.
Still I enjoy reading the scientific explanations. Even though we use the word "rotational" more than MLB hitting coaches do. They don't use the word "linear" either. I do hear the word "back spin" used a lot.
That said, I can't argue against the value of learning and practicing the real good swing. The longer a bad habit exists, the harder it is to break it.