@Jeriel :
It's with the logic that the purest one thing is, the better it is.
Idealization of the Master build the idea that he invented the best technique and each master only dull it by adding useless personnalisations.
It can be true when the philosophy change with time.
For exemple the karate learned today is very different of the one created at the origin. Because today it's a martial art used in a environment with specific rules which didn't existed before.
But in this case, where the philosophy stayed the same, there are more chances that the martial art got refined and became better with time.