Also, I thought EVs make noise to alert pedestrians and bicyclists, because the general public isn't used to quiet cars yet and honking the horn is likely to have the wrong effect.
An example is on this YouTube video [0]. First you can hear the electric acceleration, then the driver then slows down and switches on the engine noise. It even simulates the noise of gear changes...
I think that over time, this will be less of an issue, for a couple of reasons: First of all, people will be more accustomed to near-silent vehicles, and their situational awareness will adapt. Also, technology—both in the vehicle (to detect pedestrians), and for those with vision problems that otherwise need to rely on hearing—will prevent collisions.