I don't think the issue is pedestrian safety so much as "hello pedestrian get out of the way".
Yesterday driving down down our narrow neighborhood streets a fellow was getting into his truck so I came to a stop about 5 feet from him, he proceeded to stand with his door open and start reading a newspaper. Had to roll down window and say "excuse me" rather than honking and scaring the crap out of him.
This is what it's about. I agree that it's not a pedestrian
safety issue, it's just a convenience.
On the same topic: in the city where I live, cycling is a huge thing — there are cycle lanes everywhere, and cycle parking facilities at every building. Thousands of people commute to work on bikes, thousands of kids cycle to school, and there's a multi-storey parking facility for 3000 bikes under construction at the train station. There are bikes
everywhere, and of course, bikes run just as silently as an EV.
And you know what, it's
really useful to have several levels of audible warning on a bike. I've got the usual bell that gives a single DING! and is good to alert pedestrians that I'd be grateful if they could let me past; sometimes even just flicking the brake levers is enough if I'm close enough to them already. But I also have an
airhorn that's effective for warning vehicles. The bell is pointless for this, because drivers can't hear it, but blasting the airhorn at pedestrians would be really obnoxious. I use both just about every day.
And I'd like to have the same for the car. It's got the horn, but as a polite convenience, I'd like to have a bell as well.
[Incidentally, if someone brings up the canard about EVs being dangerous to pedestrians because they're silent, my stock response is, "Man, you must get hit by cyclists all the time!" which of course they don't.]