You are saying the same thing. You like to listen to music while you play and you think people, including singles, should conform to what you like or leave. It is the same exact thing. You're trying to make it into a 'PC is bad' situtation, but in fact it is you who wants other to conform to your preferences.
That being said, I like casual conversation, sounds of nature and my own inner music on the course. I don't need externally sourced music.
Don't get me wrong here. The purpose of this drill is more to gain mental strength rather than the technique for any club you choose. Since it is harder to hit the last (longest) club, you get only that one chance by the time you get to it to up the % of the result. The idea is that you have already completed your practice with the clubs you are working on and then do this drill to see how that practice relates to a pressure situation simulated on the range.