I'm not following this. Expecting visual artists to say/write something interesting about their work is like expecting musicians to communicate something interesting about their work by doing a watercolor painting.
Visual artists aren't trained to be writers or lecturers, so I don't really expect to get much enlightenment from them about the meaning of the work they produce. The important, tangible thing is the art work itself; what the artist has to say about it is more or less irrelevant.
Miles