Only at very low speeds, past 30km/h (18mph) the noise from the tyres starts to approach or surpass the noise from the engine so they're nearly equivalent.
Yes, but then there are few idiots with modified cars (or most motorbikes in general) that are orders of magnitudes louder and can be heard from kilometers away.
There are efforts to attack the car tyre noise problem by grinding groves into the surface of the road. it's called "Next Generation Concrete Surface" I remember hearing about it on the "Twenty Thousand Hertz" podcast [0]
[0] https://www.20k.org/episodes/sonicutopia
