In the Netherlands, bicycle utopia, I cannot remember the last time I used my bell to alert a pedestrian of my existence. Granted, I never cycle in Amsterdam, but that is a special location where high-powered ship horns are probably required.
Regarding ANC, I naturally turn it off while cycling on my Bose Quiet Comfort II, as the ANC will try (and fail) to cancel the noise from the wind. I don't think this is a solved problem? So for bicycle-to-bicycle alerting, this also seems overkill.
In my (Dutch) city, there is this infuriating piece of road where the bicycle path suddenly gets routed onto the kerb, intentionally mixing bikes and pedestrians. I believe the theory is that bikes will go slower so pedestrians don't need to worry about crossing the road as much or something.
Predictably, lots bikes are taken by surprise, either brake hard and suddenly or fly through pedestrians (who the biker thinks are in their bike lane, because they would be two meters earlier).
In my experience, when bikes and pedestrians meet, one of the two groups is in the wrong place and should be watching out/slowing down and waiting.
The example video shows various instances of pedestrians walking in bike lanes (and seemingly being surprised at the sudden appearance of a bike there). You can't fix stupid, but at least you can tell them to get off the bike path.
Personally, I see no use for this bell since in Austria bicycles share the road space with cars, trucks and trams rather than pedestrians, which could be more dangerous, and what I would need is a bicycle bell that could penetrate car enclosures so that drivers would get off their phones and pay attention to the stuff around them.
Yes, I know, ideally there should be dedicated cycle lanes only for bicycles but nothing in life is ever ideal, and the city isn't gonna do that anytime soon since that would mean completely eliminating car traffic on the narrow streets, witch would be political suicide, so a bell would be an instant life saver.