I think you might misunderstand the nature of the artificial sounds mentioned in this article. It's not talking about electric cars making noise for the benefit

I think you might misunderstand the nature of the artificial sounds mentioned in this article. It's not talking about electric cars making noise for the benefit of pedestrians (although that does get a cursory mention), it's talking about manufacturers of pumping artificial car noises into the cabins of cars like the Ford Mustang and the BMW M5 for the enjoyment of the occupants of the vehicle.