I never understood the desire to be loud. My EV is probably faster than most of the cars on the road screaming at the top of their lungs and showing off their engines and it's whisper quiet. I like it that way.
So if you've got some modified monster with an insane engine, it's going to be loud. And if you're a wannabe with a superficially-modified, underpowered car, you can add more noise easier than you can add more power, and hope to fool people. It's not very laudable, but you can see how it could motivate the ego of the inconsiderate.
I also enjoy concerts, though. Understandably music isn't for everyone.