Why are you fully animating a band performing in your games but not playing their music

I'm playing Dragon Quest XI for the first time on my Switch and this is one of the first things you see when you enter the city, a band of playfull looking characters yet no actual music is coming from them. Its probably my biggest pet peeve in big games, ESPECIALLY an RPG/JRPG when you're expecting to be immersed in another world. Pokemon Sword/Shield did this too but even worse make it a cutscene with only subtitles, no voice acting and is probably the most annoying example I can think of.