I had the pleasure of living on Overtoom in Amsterdam, which is a beautiful street but I'm a relatively light sleeper and even at the back part of the house you'd be woken up several times every night by some 'look at me' dude making as much noise as possible. Not a car pulling out in sight at that hour.
It’s just not true. He later told me he enjoys the feeling (vibrations) and that there was something primal about “taming” something that sounds powerful.
As for car drivers, you should be assuming they can’t see you. Driving defensively is the only way to stay alive and you can argue that it shouldn’t be that way but it doesn’t make it any less true.
Loud exhausts are definitely not designed to make motorcycles more noticeable to cars.
https://www.revzilla.com/common-tread/stop-saying-loud-pipes...
But those are rarely the 'loud' types, they're just people using their bikes as transport rather than as an attention seeking device.