I believe that any music that conveys a genuine emotion to have inherent value. Now, I also believe that there is music that attempts to express an emotion, but it is not genuine--that is, it doesn't feel authentic. Of course this is subjective. However, I believe that a majority of people when listening to an authentic performance will be positively affected by the musician's emotion. Many times I have spoken to people about a musician or a band and have heard that when attending a live performance they "fell in love with their music" (or some other statement of high praise).
On a related note this, I believe, is one of the challenges of making recordings. Perhaps it is something akin to a photographer who can capture the beauty of a subject. Or, likewise, a photograph of a person or a scene will often fail to do its subject justice and provide a false impression of the subject's value. A great recording artist should be able to capture the emotional content of the musician, who otherwise may be more effective at expressing an authentic emotion when performing live.
It seems I've veered away from my original topic. However, I'm interested in what anyone who reads this journal might have to say on this subject.