Complaining about an ice cream truck you can hear in the back of your house while wearing noise cancelling headphones isn’t Karen culture.
So is defending the behavior and imposing it on everyone around you just because it's sometimes convenient for you to walk 10 meters for some ice cream once a month.
Like TFA says, we have to decide as a society what kind of noise we think is worthwhile. The sound of kids playing seems essential for a culture to stay friendly to family development.
But broadcasting an advertisement jingle to neighborhoods because you want to make money, perhaps not.
> cultural shift toward being selfish
I enjoy ice cream so damn all other opinions :)