Obviously comparing an apple and an orange isn't really that useful when doing direct comparisons. Making the car much more quiet for its occupants is not even in the same ballpark as what some jerkass contingent does to modify their car to make the world a less quiet place.
Okay, that's fine, the person I replied to was talking about removing road noise from the environment, so it seemed pertinent that lots of road noise is from vehicles that are in no way trying to reduce it.