Re: why focus on internal power
I'm not sure that statement is quite accurate, William. While some may have used the ki skills as a neccessary component to *really* doing pretty much *any* asian art, I have heard repeated statements about how timing, focus, movement, etc., are all a part of *how* this is used.
No one is saying study this to the exclusion of all else. There are some people who have said that in their particular journey, they want to develop these skills first, and then go to dojo or whatever to focus on a particular art. While that would not be my choice, I can accept their reasoning, and would not overtly critisize them for that choice.