> There is a similar noise-is-strength in vacuum cleaner sales.
Thankfully that seems to only really happen on the cheaper, or smaller end of the vacuum spectrum. My Shark handheld is so obnoxious that the dog tries to rip it out of my hands so she can chew it to pieces. My Sebo canister vac, on the other hand, is much quieter. It's a selling point. And it really, really sucks!
Back before they started adding in artificial noise, I almost got hit by a Prius because I couldn't hear it and the driver was distracted. It was only due to the noise of some loose gravel on the pavement that I became aware of the car and got out of the way.