I live near a road with a 100 km/h speed limit, all I hear is the tires on the road, no engine. I guess an electric car could be even louder, as they are heavier. The loudest vehicles here are the trucks, but again, can’t hear the engine, just the sound of the tires. Especially when it rains and the road is wet.
I don’t know what ‘breaking down the hill’ means, but of course there are scenarios where combustion engines are louder. When they wait on a red light e.g. My point is: EVs suck as much as combution engine cars, they are both loud.
Why not opt for the option of more public transport, bikes and cars only where they are absolutly neccessary - for all I care EVs.