This is an impassioned argument that I hear frequently from those with loud engines. It’s not supported by data:
http://www.maids-study.eu/pdf/MAIDS2.pdf. Because of the Doppler effect, the volume of your engine is not playing a significant role in detection by a driver in the vast majority of serious accidents due the fact that most of them are frontal.
On a personal level, the world you’re describing sounds like hell to me. There’s already way too much noise pollution. I ride motorcycles, I agree car drivers are inattentive to non-cars. Slowing down is the answer for noise and safety, save speed for track days.
