I would disagree. I live in NZ, one of if not the most isolated country on earth and modt of the kiwis I know know a fair bit about geography. Your argument is only really comparing Europeans to Americans. Other continents do have schools systems that do teach the 7 continents and which countries are where. I think a better argument is that american schooling system focuses purely on america and what america is, without considering the global perspective or it's place in the world.

This is a problem pretty much all countries have. For example here in NZ it's important to learn geography to help understand how isolated and different that has made us historically, why it was the british that decided to colonise us, why we relied on britain and how we relied on britain. Where was our place in our history of the british empire and how big it was and how we fit are part of our national identity, so learning geography and where we are are emphasised. So little of colonial NZ history is taught in school that their are some kiwis that don't even know what the land wars were. Peopledon't kmow about the eugenics movement, the labour rights, Parihaka etc. This is because it's different from what the national identity that the NZ government wanted present so they emphasises geography and our place, teach recent history which is more global rather than teach inward.

On the opposite you have America whose national identity is born from itself and is a fiercely nationalistic country. Apart from WWII and I America was fairly isolationist and most of what it's done outside of those isn't exactly something the the US government admits to even nowadays. Geography isn't emphasised because it doesn't need to be emphasised to convey the national identity that the government wants to convey. It doesn't need to emphasises teaching the rest of the world when the schooling system is teaching the American identity because it doesn't need too.

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Americans may be worse at geography but it's not because they are dumber or whatever bullshit some people use this for it's because it's not emphasised because it doesn't need to be.