My suspicion is this:

You can learn to appreciate anything that requires creativity if you understand what they're trying to do and stuff like that. It starts out that they're creatively trying to accomplish something, like making a soothing sound in this case. Once people start appreciating it for the art, rather than just sounding nice, people will then create it for the art, rather than to sound nice. After a while, you end up with an art form that's very different than what it started as. It's still good. It's just something completely different, and each will look bad if you don't realize it's what you're looking at. Never read a literary masterpiece if you want a nice story. Never read a popular story if you want a literary masterpiece.