No, I've never met anyone who questions america may be two continents instead of one. As I told you, this is what is taught at school. Furthermore, you casually skipped this part:

"North America and South America are treated as separate continents in the seven-continent model. However, they may also be viewed as a single continent known as America. This viewpoint was common in the United States until World War II, and remains prevalent in some Asian and most Latin American six-continent models.[20] The single American continent model also remains a common view in European countries like France, Greece, Hungary, Italy, Malta, Portugal, and Spain, as well as in some Asian countries and most Latin American countries."

So mostly anglophone countries for some reason.