I have a lot of experience with helping stroke victims, which is exactly why I used the walking example.

They need help to do what we, and they used to do without thinking. Writing down in words (or on a stave) exactly how to walk, would be little help and make it sound impossible.

I was not knocking your explanation in any way at all, for those who approach music through the page I am quite sure it made a lot of sense and be most helpful.

For both problems confidence is also a big factor. The methods for instilling that will vary with the individual.

I have the exact opposite problem with hornpipes. Every time I write a tune, it will end up being another 'bloody' hornpipe, if I don't make a concious effort to stop it!