Check out: https://youtu.be/CTV-wwszGw8?t=815
What do you have in mind? I can’t think of anything as effective as sound—the blind person needs no special hardware to perceive it, and it can be easily spatially localized.
Noise pollution from ie ambulance, sports car, basically any motorbike, old car, trucks and so on is much much bigger. Where is your outrage for those?
And no, noise pollution from these cars discussed is not causing massive health issues that outweigh people getting maimed and killed by them, thats just your personal preferences (like not owning a car because you are young without a family etc) you would like to push on whole society for whatever personal reasons.
Maybe his personal reason is that he's absolutely capable of getting out of the way of a car, but he doesn't like noise. That's a reasonable preference. If you absolutely can't guarantee that a kid ends up under a car without the noise, fine, but I doubt that's true.
Sure, we dont live on this planet alone, but that seems like it's more justification for not intentionally making our shared space miserable, not less.
I've heard that some EV drivers turn off the sound because it annoys them. They are potentially setting themselves up for a lifetime of remorse.
Just when significantly cutting noise pollution from motor vehicles in urban areas is finally within our grasp we toss it away by forcing them to make stupid and annoying UFO noises on the grounds of nebulous safety concerns.
There were any number of ways of solving this that would have been less annoying and better for peoples' health[0].
For one thing, most people are able to use their eyes and will learn soon enough that EVs don't make much noise at low speeds. And for those who are partially sighted or blind some sort of warning device + appropriate signal could no doubt have been engineered and legislated.
But, no, we've gone for stupid noises instead.
[0] We now, of course, know that noise pollution does in fact cause health issues and, I'd argue, these outweigh the safety argument.