Motorcycles are fun as hell, but safety has nothing to do with loudness and everything to do with hyper situational awareness and anticipating problems. The fatality curve peaks squarely in the Dunning-Kruger zone. New riders make mistakes but usually resulting in no or lesser injuries because they're scared and careful. It's when people get (over) confident at a year or so that the real problems come, usually resulting in a really bad scare or death or major injury. Those that (can and do) continue become super aware of their surroundings and are mostly the safest drivers out there, and the death and accident rate goes way down.

Truthfully driving societies would be way better off if people had to start on motorbikes (or ebikes) before starting to drive around 2 tons of death, the awareness stays with you. That said, fuck cars.

None of any of that has anything to do with noise, cars are sound isolated against their own noise FFS. In aggregate cars make much more noise than motorbikes anyway, sheer numbers, it's just that you notice the dickhead with the loud pipes more (when you're not in a sound isolating car).