Why do so many dog owners allow their dogs to incessantly bark?

I am not interested in discussing how to stop a dog from barking. There’s lots of discussions of that already here, all with less-than-perfect advice.

I am more interested in hearing about the psychology of the kind of person who would happily go about their day in their home, while their dog barks nonstop outside.

Do they not hear the barking? Do they enjoy the barking? Are they basically just brain-dead and they just tune out the noise?

If I had a dog that barked all the time, I’d be so embarrassed and ashamed. I’d cringe every time those decibels emanated from my property.

Where’s the embarrassment, shame, and responsibility of dog owners who let their dogs bark all the time?

What in their minds is justifying the unnecessary noisy chaos they are creating? Are these people so afraid of silence and the stillness of their own minds, that they always need something noisy to be happening (such as children, TV, dogs, whatever can add noise to their household etc).?