Nope pretty normal actually. Netherlands is famously tall, Germamy and UK are good parallels to the USA in terms of HDI i think. And if you're already deciding to shos the usa or netherlanda, it makes sense to show their nearest language cousins - the UK and Germany.

India and China are leading economies in their respective continent, and have "developing economy" regions. So this allows us to basically go "North America, Europe, Asia," and compare and contrast developed against underdeveloped.

Also i've seen this selection of countries for a bunch of different stuff too.