It seems the smaller the world the more it is that way. When you think about the time he is referring too, the martial art world was very small and everyone had a good idea about one another. This produced a more personal atmosphere than exists today. Now things expanded and everyone and their dog has a black belt. The personal feeling is not there as much and the results are many biased people who feel that they what they learn is the "true" art or the "real" art for the streets. They tend to look down at certain arts or pass judgment based on ignorance and speculation more than actual training.