I think 'understand' meant just that. There is something to understand, at least for a certain segment of non-audiophile types.
Music to many of them is a passing distraction on which they have never focused their full attention. I have had a number of friends and neighbors over to listen, and when presented with nothing on which to focus except the audio, it has never failed to garner a new found understanding for the art of sound reproduction. Whether or not they care is another matter.