Xue, I think that a lot of the problem with westerners accepting things at face value has to do with the fact that eastern martial arts have only been in the states as a real presence since the late forties, and that's being generous. On the other hand, a Chinese man of a hundred and seven would never have known a time that the traditional arts were not around.
For westerners, MA still has that shiney, new, 'ooh' ah cool factor. It's worn off a bit, which is why when a "new style" is introduced, it reignites the new-cool factor for some.
Lastly, Americans are truly talented at reinventing things, systemetizing things, and improving things. Yankee ingenuity, we like to call it. And we are. This mentality is born of being a young country that had to do just that in order to survive as colonists, break with a world power, expand, and become a world power in our own rite. The flipside is that we tend to think that this can be done with anything, and sometimes, we just don't have the background to do it.
Some Americans do found new styles the right way. Many do not. To be fair, we've had a goodly amount of 'the wrong way' being done by easterners right along side of us. Easterners who got on a plane in the orient as third dan and got off of the plane as ninth dan venti supremo grandmasters. Once we saw that they could do it, then why not us?
Just a few observations. I make no judgements about anyone creating a style until I have experienced it myself or studied its history fairly extensively. Needless to say, I haven't made very many judgements about new styles.
Daniel