They are important, but ignoring every contrary indicator (per capita GDP, life expectancy, quality of life, etc) in order to exaggerate the extent to which the US lags other nations is the very definition of cherry picking. The US is squarely a first-world country even if it lags various countries other first world countries in certain regards. No doubt this “third world country” business is hyperbole for many people who invoke it (although I think there are many who invoke it who sincerely believe it or just have no moral scruples whatsoever), I’m just saying such rhetoric is unhelpful at best and probably divisive and misleading.

Out of those three examples you gave, Western Europe still wins on 2/3 (higher life expectancy, higher quality of life). Granted the second is subjective somewhat, but I believe most would agree. The first is objectively lower in the US compared to Western Europe, you can check the statistics. Per capita GDP is only high in the US due to massive wealth inequality and a ridiculous concentration of billionaires. It's not "ignoring every contrary indicator", it's that most of the indicators that are used to support the idea that the US is "better" (e.g. per capita GDP) are fundamentally flawed in different ways, and don't amount to a proper comparison of the quality of life.

For the third time now, being behind (some parts of) Europe doesn’t make a country “third world”. Also, I agree that GDP is imperfect—no one is claiming any indicator is perfect. However, the median US adult also has more wealth than the median European adult, and that figure isn’t skewed by billionaires. https://en.m.wikipedia.org/wiki/List_of_countries_by_wealth_...