I think it explains what the director was trying to get across. If you see somthing different, that fine. But I don't see anything wrong with some one trying to explain what the director meant. So long as they are not explaining what they think the director meant, which would just be their interpretation. As long as the explaination is one handed down from the director, IMHO I think its ok for someone to explain it to someone else. Especially when we are talking about a movie as hard to understand as 2001.

seeing the explaination of 2001 gave me a new appreciation for the movie.