Yep - they've got music.
The fact that they have it has had no impact on their civilisation. They're a primitive society with music, and they wouldn't be any more or less primitive without it.
But look at the things they're missing. No electricity, no telecommunications, no automobiles, no clean water on demand, no modern medicine. These are what set them apart from modern societies with these amenities. Not art or music.
Their music has a huge impact on their civilization as it is the entire tradition of their civilization. It is the crux of their being - passing down their traditions.
But you know what? They are happier than us. Once again I bring you back to the subjective point: They like their lives. Not everyone wants the internet and roads and signs and TV. Many people are content with what they have. They do not all want what you want.
This sums it up and is a good read:
The American investment banker was at the pier of a
small coastal Mexican village when a small boat with
just one fisherman docked.
Inside the small boat were several large yellow fin tuna.
The American complimented the Mexican on the quality
of his fish and asked how long it took to catch them.
The Mexican replied, “Only a little while.”
The American then asked, “Why didn’t you stay out longer
and catch more fish?”
The Mexican said, “With this I have more than enough to support my family’s needs.”
The American then asked, “But what do you do with the rest of your time?”
The Mexican fisherman said, “I sleep late, fish a little, play with my children, take siesta with my wife, Maria, stroll into the village each evening where I sip wine and play guitar with my amigos, I have a full and busy life.”
The American scoffed, “I am a Harvard MBA and could help you. You should spend more time fishing; and with the proceeds, buy a bigger boat: With the proceeds from the bigger boat you could buy several boats. Eventually you would have a fleet of fishing boats. Instead of selling your catch to a middleman you would sell directly to the
processor; eventually opening your own cannery. You would control the product, processing and distribution. You would need to leave this small coastal fishing village and move to Mexico City, then Los Angeles and eventually New York where you will run your ever-expanding enterprise.”
The Mexican fisherman asked, “But, how long will this all take?”
To which the American replied, “15 to 20 years.”
“But what then?” asked the Mexican.
The American laughed and said that’s the best part. “When the time is right you would announce an IPO and sell your company stock to the public and become very rich, you would make millions.”
The American said, “Then you would retire. Move to a small coastal fishing village where you would sleep late, fish a little, play with your kids, take siesta with your wife, stroll to the village in the evenings where you could sip wine and play your guitar with your amigos.”