This is a poorly researched article. The article notes how difficult it is to compare educational outcomes, and rightly so. However, the college experience is also vastly different, across many dimensions, in the US than Europe (to use EU as an example).
I offer these examples, and am not making judgements either way, there are pros and cons for all systems. Generally, In the US, colleges are run like businesses, rather than as a government provided service. Even state schools are being managed more like businesses, as financials really matter—that’s why many state schools are increasing the proportion of full-pay OOS students. Our local high school (high achieving, trends affluent) GCs joke that ‘UCB didn’t give our students the time of day until the financial crisis, and now they can’t get enough of our full pay kids’. A typical bachelors degree only takes 3 years to earn in the EU, which also reduces the cost burden.
Additionally, and again, this is in general (there are no absolutes), schools in the EU offer a very different student (customer) experience. Most EU students live at home with their family, or in an apartment, while they go to school. Most EU colleges don’t provide student housing, student services (such as health care, mental health counseling) or offer student clubs/activities.
Lastly, one huge difference is that there are very limited intercollegiate sports (generally none) in EU colleges. Most US colleges, bear significant expense on a wide array of sports (intercollegiate, club and intramural), and the various related facilities.
These are just a few of the things that highlight the fairly substantial differences in educational systems. Plusses and minuses, pros and cons, across the board. Lots of options for all, including going overseas for a college degree.