That also is my perception, from Brazil. There is even the concept of "cordial man", coined by sociologist Sergio Buarque d Holanda, that is connected to this
In Brazil is usual to hear in more educated circles the denomination "estadunidense", which is essentially the same thing as USAian. Or north-americans, when talking about the culture from the standpoint of Brazilians.
It's far from true that no one cares.
https://en.wikipedia.org/wiki/Cordial_man