When you are dancing or doing gymnastics, backgound music is crucial. But in the morning when I walk by the park, I always see people practicing tai chi with background music. I doubt it.
The background music is an obstruction to people who are practicing tai chi no matter he agrees or not. I totally understand the reason why they put on background music, maybe they want to create a so called "quiet" enviroment.
But the problem is right here. First of all, it's not you WANT to have a quiet background but you NEED to. Secondly, the background music is not the quiet enviroment YOU have but the MUSIC itself has if you know what I mean.