I actually moved out of Seattle in 1984. I am not saying its some kind of Utopia- I was strictly using it as an example of an average priced US city in the top 1/2 of US cities, and comparing costs in such a city to Buenos Aires.
As I mentioned, about 75 million US citizens live in cities where the cost of living is about the same as Seattle.
And that cost is well above Argentina.
This was my point, and it remains true.
Certainly, there are cheaper places than Seattle in the USA, just as there are cheaper places than BA in Argentina. But most people, in either country, dont live in those cheaper places.