It's all about attention. People need attention. They're willing to do anything to get it. The question becomes whether they have positive and orderly means of getting attention or negative and chaotic means.
When were young we get shown what it takes. Our strategies are formed by our experiences. Unfortunately, there's some very large cultural groups that only teach their children how to get attention via negative means. They'll get angrier and order until you notice them. You don't have to like them, only see them.
One route to getting attention is to just be a loud, angry, asshole in public. Generally do things to make people deal with you because you've got no other routes to validation or attention. The US loud car cultures are one of those strategies. Cara are anonymous, we live in isolating communities, and if you can make your presence loud enough people will be forced to give you the attentive n you crave. It's pretty, childish, and spiteful, but at least you're not nobody anymore.
Choosing loud cars is literally killing people. The research is finding that living in places with elevated noise levels is shortening lifespans through stresses from fight or flight reactions over time.
All of this are showing symptoms of much deeper societal trauma that will plague us for generations.
In the mean time, I vote we find cars that exceed a sound db rating and crush them immediately. No questions. Drag them to the machine and cube them.