>They are also immune to embarrassment.
No, they, especially one of them has EXTREME anxiety about his image, just not in the way that normal people do. He's got the psychology of an anxious child wanting to please a neglectful father. This is why TACO. And why every third word is some ridiculous boast about something nonsensical. This is insecurity driven politics and its WHY HE GOT ELECTED. Fear and insecurity electing what they imagine strength to be.
What would the stupidest, most insecure, adult child think is the pinnacle of strength? ... yup.
And the attention economy is being set up to exploit this demographic because it's the lowest common denominator and it WORKS.
Evolutionarily it's some kind of mechanism to weed out the weaknesses in a population by exaggerating them so it's easier for natural selection to weed them out? Or punishing the rest of us for not doing enough about it before it got so bad... something like that.